{ "name": "Data center general contractors, ranked", "url": "https://datacentergeneralcontractors.com/", "license": "CC BY 4.0", "cite": "Data Center General Contractors, https://datacentergeneralcontractors.com/", "updated": "2026-11-11", "fields": [ { "key": "company_type", "label": "Contractor type", "type": "enum", "description": "What the firm is when it leads a data center job: a general contractor or construction manager, an engineer-constructor that designs and builds under one EPC contract, a design-build specialist focused on advanced-technology facilities, or an electrical contractor that holds the prime contract.", "filterable": true, "sortable": true, "enumValues": [ "General contractor", "Engineer-constructor (EPC)", "Design-build specialist", "Electrical contractor as prime" ] }, { "key": "enr_telecom_rank", "label": "ENR telecom rank", "type": "number", "unit": "#", "description": "Rank on ENR's 2026 Top 20 Contractors by Sector: Telecommunications, ranked by 2025 revenue. ENR's telecom sector covers data centers, cabling and towers, and ENR credits the data center buildout for the sector's 86.4% growth in 2025.", "filterable": false, "sortable": true }, { "key": "enr_telecom_revenue_usd_m", "label": "Telecom/DC revenue 2025", "type": "number", "unit": "$M", "description": "2025 telecommunications-sector revenue in US$ millions as ENR published it in the 2026 Top 20 by Sector table (data centers sit in this sector).", "filterable": true, "sortable": true }, { "key": "enr_top400_rank", "label": "Top 400 rank", "type": "number", "unit": "#", "description": "Overall rank on ENR's 2026 Top 400 Contractors list (May 25, 2026 issue), ranked by 2025 US and international construction revenue.", "filterable": false, "sortable": true }, { "key": "enr_top400_rank_prev", "label": "Top 400 rank (2025 list)", "type": "number", "unit": "#", "description": "The firm's rank on the 2025 Top 400 list, as printed beside its 2026 rank. A drop in the number is a climb up the list.", "sortable": true }, { "key": "telecom_share_pct", "label": "Telecom/DC share", "type": "number", "unit": "%", "description": "Share of the firm's 2025 Top 400 revenue that came from ENR's telecommunications sector (data centers, cabling, towers), as printed in the Top 400 table.", "filterable": true, "sortable": true }, { "key": "cmar_share_pct", "label": "CM-at-risk share", "type": "number", "unit": "%", "description": "Share of the firm's 2025 revenue delivered as construction manager at risk, as printed in the ENR Top 400 table.", "filterable": true, "sortable": true }, { "key": "total_revenue_usd_m", "label": "Total revenue", "type": "number", "unit": "$M", "description": "Company-wide annual revenue in US$ millions for the year in Revenue year, from the company, its filings or ENR. Non-USD figures are converted at the rate stated in Revenue note.", "filterable": true, "sortable": true }, { "key": "revenue_year", "label": "Revenue year", "type": "number", "description": "Year (or fiscal year) the total revenue covers.", "sortable": true }, { "key": "revenue_note", "label": "Revenue note", "type": "string", "description": "Basis of the total revenue: which entity, fiscal year end, and any currency conversion.", "sortable": false }, { "key": "delivery_models", "label": "Delivery models", "type": "string", "description": "Published contracting methods or delivery services. A named project supports that project’s model; company service pages describe broader capabilities. CM-at-risk shares from ENR are company-wide, not data-center-only.", "filterable": true, "sortable": false }, { "key": "design_build", "label": "Design-build", "type": "bool", "description": "Offers design-build or EPC delivery (one contract for design and construction), per the firm's own pages.", "filterable": true }, { "key": "cm_at_risk", "label": "CM at risk", "type": "bool", "description": "Offers construction management at risk (guaranteed maximum price), per the firm's own pages.", "filterable": true }, { "key": "self_perform", "label": "Self-perform trades", "type": "string", "description": "Own-crew or in-house subsidiary capabilities stated by the firm. Company-wide capabilities are not proof they were used on every data center. Unspecified trades remain explicitly unspecified; scope and subsidiary qualifiers are preserved.", "filterable": true, "sortable": false }, { "key": "self_perform_electrical", "label": "Self-performs electrical", "type": "bool", "description": "Performs electrical work with its own crews or an in-house electrical subsidiary, per the firm's own pages.", "filterable": true }, { "key": "markets", "label": "Markets", "type": "string", "description": "Regions where the firm builds data centers, from its own office list or project pages: North America, Latin America, Europe, Middle East, APAC.", "filterable": true, "sortable": false }, { "key": "dc_track_record", "label": "Data center track record", "type": "string", "description": "The firm's own headline data center claim with its basis kept intact: MW delivered, projects completed or square feet built, and whether it is cumulative, annual or delivered-or-underway.", "sortable": false }, { "key": "dc_mw_claimed", "label": "MW claimed", "type": "number", "unit": "MW", "description": "The megawatt number in Data center track record, for sorting. Bases differ (delivered, annual, underway); read it with the track record text.", "filterable": true, "sortable": true }, { "key": "named_clients", "label": "Named data center clients", "type": "string", "description": "Data center owners, operators or tenants the firm or its client has publicly named on a project. Confidential clients are never inferred.", "sortable": false }, { "key": "ownership", "label": "Ownership", "type": "enum", "description": "Who owns the firm: its employees (ESOP or employee shareholders), a family or private holders, public shareholders, or a listed parent group.", "filterable": true, "sortable": true, "enumValues": [ "Employee-owned", "Privately held", "Publicly listed", "Subsidiary of listed group" ] }, { "key": "employees", "label": "Employees", "type": "number", "description": "Headcount as the firm or its parent reports it (whole company, not data center staff).", "sortable": true }, { "key": "headquarters", "label": "Headquarters", "type": "string", "description": "Head office city and country as the firm states it.", "sortable": true }, { "key": "reference_project", "label": "Reference project", "type": "string", "description": "Named data center project. Kept separate from company-wide portfolio claims.", "sortable": false }, { "key": "project_capacity", "label": "Reference capacity and basis", "type": "string", "description": "Published capacity of the reference project, preserving planned, ultimate and phase qualifiers. Not a delivered portfolio total.", "sortable": false }, { "key": "project_status", "label": "Reference project status", "type": "string", "description": "Status stated by the cited project source; an announcement does not establish completion.", "sortable": false }, { "key": "completion", "label": "Reference completion", "type": "string", "description": "Published project completion date or forecast, preserving the source’s qualifier.", "sortable": false }, { "key": "project_area_sqm", "label": "Reference project area", "type": "number", "description": "Area of the reference project in square metres, as stated by the source.", "sortable": false }, { "key": "delivery_scope", "label": "Reference delivery scope", "type": "string", "description": "Construction responsibilities described by the project or capability source. Delivery scope does not by itself establish a design-build contract.", "sortable": false }, { "key": "corporate_status", "label": "Corporate status", "type": "string", "description": "Published corporate name or structure change, with announcement and effective dates kept distinct.", "sortable": false } ], "records": [ { "id": "aecom-tishman", "name": "AECOM Tishman", "url": "https://aecom.com/aecom-tishman/", "summary": "The construction management arm of AECOM, delivering 70% of its 2025 work as CM at risk, including critical infrastructure and interiors for Sentinel Data Centers in New York.", "hq": "US", "tags": [ "us", "cm-at-risk", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": 18, "enr_top400_rank_prev": 14, "telecom_share_pct": 5, "cmar_share_pct": 70, "total_revenue_usd_m": 8298.2, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk", "design_build": null, "cm_at_risk": true, "self_perform": null, "self_perform_electrical": null, "markets": "North America", "dc_track_record": "Construction manager of critical infrastructure and interiors for Sentinel’s 131,000 sq ft Orangetown, New York data center", "dc_mw_claimed": null, "named_clients": "Sentinel Data Centers, Russo Development", "ownership": null, "employees": null, "headquarters": "Dallas, TX, US", "reference_project": "Sentinel/Russo data center, Orangetown, New York, United States", "project_capacity": "Over 7 MW planned critical power following low-voltage fit-out; historical 2013 announcement", "delivery_scope": "Construction management of critical infrastructure and interiors" }, "sources": [ { "url": "https://aecom.com/press-releases/aecom-announced-today-that-its-tishman-construction-operation-is-serving-as-construction-manager-of-critical-infrastructure-and-interiors-for-sentinel-data-centers-and-russo-developments-new/", "title": "AECOM Tishman: construction manager for Sentinel Data Centers", "accessed": "2026-11-11", "fields": [ "markets", "named_clients", "dc_track_record", "reference_project", "project_capacity", "delivery_scope", "company_type" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "black-and-veatch", "name": "Black & Veatch", "url": "https://www.bv.com/", "summary": "Engineer-constructor that delivers full EPC for data center campuses with their substations, generation and water, for hyperscale, colocation and neocloud operators.", "hq": "US", "tags": [ "us", "epc", "design-build", "cm-at-risk", "enr-ranked" ], "fields": { "company_type": "Engineer-constructor (EPC)", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": 49, "enr_top400_rank_prev": 45, "telecom_share_pct": 5, "cmar_share_pct": 20, "total_revenue_usd_m": 2901.4, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk, EPC", "design_build": true, "cm_at_risk": true, "self_perform": "Electrical (Bird Electric; utility infrastructure)", "self_perform_electrical": true, "markets": null, "dc_track_record": "Full EPC across substations, generation, water and data center facilities; chilled water, air, direct-to-chip and immersion designs", "dc_mw_claimed": null, "named_clients": "Nautilus Data Technologies", "ownership": null, "employees": null, "headquarters": "Overland Park, KS, US", "delivery_scope": "Full EPC across substations, generation, water and data center facilities" }, "sources": [ { "url": "https://www.bv.com/en-US/what-we-do/data-center-campus", "title": "Black & Veatch: Data Center Campus", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build", "dc_track_record", "delivery_scope", "company_type" ] }, { "url": "https://www.bv.com/en-US/projects/commissioning-for-worlds-first-zero-water-consumption-data-center", "title": "Black & Veatch: Commissioning for zero-water data center", "accessed": "2026-11-11", "fields": [ "named_clients" ] }, { "url": "https://www.bv.com/en-US/what-we-do/lifecycle-services/construction", "title": "Black & Veatch: Construction entities and Bird Electric", "accessed": "2026-11-11", "fields": [ "self_perform", "self_perform_electrical" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "bouygues-construction", "name": "Bouygues Construction", "url": "https://www.bouygues-construction.com/", "summary": "French group that has delivered 800 MW+ of data center installations worldwide from design through commissioning, including AirTrunk’s hyperscale campus in Australia.", "hq": "FR", "tags": [ "europe", "apac", "design-build", "hyperscale" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": null, "enr_top400_rank_prev": null, "telecom_share_pct": null, "cmar_share_pct": null, "total_revenue_usd_m": null, "revenue_year": null, "revenue_note": null, "delivery_models": "Design-build", "design_build": true, "cm_at_risk": null, "self_perform": null, "self_perform_electrical": null, "markets": "Europe, APAC", "dc_track_record": "800 MW+ of data center installations delivered worldwide", "dc_mw_claimed": 800, "named_clients": "AirTrunk", "ownership": null, "employees": null, "headquarters": null, "delivery_scope": "Turnkey, from design to construction, retrofit and operation" }, "sources": [ { "url": "https://www.bouygues-construction.com/en/sectors/industries-technologies/data-centers", "title": "Bouygues Construction: Data centers", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build", "dc_track_record", "dc_mw_claimed", "company_type" ] }, { "url": "https://www.bouygues-construction.com/en/about-us/news/bouygues-construction-secures-expanded-contract-for-airtrunks-major-hyperscale-data-centre-campus-in-australia", "title": "Bouygues Construction secures expanded contract for AirTrunk campus", "accessed": "2026-11-11", "fields": [ "markets", "named_clients" ] }, { "url": "https://www.bouygues-construction.com/en/activities/industries-technologies/data-centers", "title": "bouygues-construction.com: data centers", "accessed": "2026-11-11", "fields": [ "delivery_scope" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "brasfield-and-gorrie", "name": "Brasfield & Gorrie", "url": "https://www.brasfieldgorrie.com/", "summary": "Birmingham builder with 5,000+ employees that sells design-build as one contract and one team, self-performs concrete and sitework, and builds hyperscale and enterprise data centers for clients including DataBank and DC BLOX.", "hq": "US", "tags": [ "us", "design-build", "cm-at-risk", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": 18, "enr_telecom_revenue_usd_m": 2028.5, "enr_top400_rank": 24, "enr_top400_rank_prev": 23, "telecom_share_pct": 26, "cmar_share_pct": 8, "total_revenue_usd_m": 7657.3, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk, Design-build", "design_build": true, "cm_at_risk": true, "self_perform": "Concrete, Sitework", "self_perform_electrical": null, "markets": "North America", "dc_track_record": null, "dc_mw_claimed": null, "named_clients": "DataBank, DC BLOX", "ownership": null, "employees": 5000, "headquarters": "Birmingham, AL, US", "reference_project": "ATL-DC2 campus and data hall build-outs, Atlanta, Georgia, United States", "project_capacity": "48 MW critical IT load for original ATL-DC2; expansion separately listed as 24 MW", "delivery_scope": "Campus construction and live data hall build-outs" }, "sources": [ { "url": "https://www.brasfieldgorrie.com/", "title": "Brasfield & Gorrie home", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build", "self_perform", "employees", "company_type" ] }, { "url": "https://www.brasfieldgorrie.com/markets/mission-critical/", "title": "Brasfield & Gorrie: Mission Critical", "accessed": "2026-11-11", "fields": [ "markets", "named_clients" ] }, { "url": "https://www.brasfieldgorrie.com/projects/atl-dc2-campus/", "title": "brasfieldgorrie.com: atl dc2 campus", "accessed": "2026-11-11", "fields": [ "reference_project", "project_capacity", "delivery_scope" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "enr_telecom_rank", "enr_telecom_revenue_usd_m", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "burns-and-mcdonnell", "name": "Burns & McDonnell", "url": "https://www.burnsmcd.com/", "summary": "Kansas City engineer-constructor that takes data centers from site selection through design and construction under one turnkey design-build contract.", "hq": "US", "tags": [ "us", "design-build", "epc", "cm-at-risk", "enr-ranked" ], "fields": { "company_type": "Engineer-constructor (EPC)", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": 35, "enr_top400_rank_prev": 42, "telecom_share_pct": 0, "cmar_share_pct": 2, "total_revenue_usd_m": 4525.9, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk, Design-build", "design_build": true, "cm_at_risk": true, "self_perform": "In-house construction teams and AZCO subsidiary; individual trades not specified on delivery page", "self_perform_electrical": null, "markets": "North America", "dc_track_record": "Turnkey design-build from site selection through design and construction for data center owners, enterprises and government agencies including the Department of Defense", "dc_mw_claimed": null, "named_clients": null, "ownership": null, "employees": null, "headquarters": "Kansas City, MO, US", "delivery_scope": "Turnkey design-build; site selection through design and construction" }, "sources": [ { "url": "https://www.burnsmcd.com/services/buildings/mission-critical-buildings/data-centers-switch-centers", "title": "Burns & McDonnell: Data Centers", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build", "markets", "dc_track_record", "delivery_scope", "company_type" ] }, { "url": "https://www.burnsmcd.com/services/construction/project-delivery", "title": "Burns & McDonnell: Self-perform project delivery", "accessed": "2026-11-11", "fields": [ "self_perform" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "cap-ingelec", "name": "Cap Ingelec", "url": "https://www.capingelec.com/", "summary": "French design-and-build data centre contractor building Telehouse’s TH3 Paris Magny 2 expansion, with a 1.3 design PUE on the second module.", "hq": "FR", "tags": [ "europe", "design-build" ], "fields": { "company_type": "Design-build specialist", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": null, "enr_top400_rank_prev": null, "telecom_share_pct": null, "cmar_share_pct": null, "total_revenue_usd_m": null, "revenue_year": null, "revenue_note": null, "delivery_models": "Design-build", "design_build": true, "cm_at_risk": null, "self_perform": null, "self_perform_electrical": null, "markets": "Europe", "dc_track_record": "Design and build of Telehouse TH3 Magny 2, phase 2: 3 MW IT in a 1,600 m² module", "dc_mw_claimed": null, "named_clients": "Telehouse", "ownership": null, "employees": null, "headquarters": null, "reference_project": "Telehouse TH3 Magny 2 Phase 2, Magny-les-Hameaux, France", "project_capacity": "3 MW IT capacity in the second module", "delivery_scope": "Design and build" }, "sources": [ { "url": "https://www.capingelec.com/en/work-in-progress-at-the-th3-paris-magny-2-datacenter/", "title": "Cap Ingelec: Work in progress at TH3 Paris Magny 2", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build", "markets", "named_clients", "dc_track_record", "reference_project", "project_capacity", "delivery_scope", "company_type" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "clark-construction", "name": "Clark Construction", "url": "https://www.clarkconstruction.com/", "summary": "McLean, Virginia builder, No. 15 on ENR’s 2026 Top 400, that builds data centers in Northern Virginia as general contractor, including NTT’s 24 MW VA6 in Ashburn.", "hq": "US", "tags": [ "us", "cm-at-risk", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": 15, "enr_top400_rank_prev": 19, "telecom_share_pct": 12, "cmar_share_pct": 52, "total_revenue_usd_m": 8968.4, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk, General contracting", "design_build": null, "cm_at_risk": true, "self_perform": "Concrete, Foundations, Sitework, Electrical (C3M Power Systems)", "self_perform_electrical": true, "markets": "North America", "dc_track_record": "General contractor for NTT VA6 in Ashburn, Virginia: 180,000 sq ft, 24 MW critical IT load, completed 2024", "dc_mw_claimed": null, "named_clients": "NTT", "ownership": null, "employees": null, "headquarters": "McLean, VA, US", "reference_project": "VA6, Ashburn, Virginia, United States", "project_capacity": "24 MW critical IT load; supported by Clark’s Fall 2023 newsletter, avoiding the project page’s apparent “24M” typo", "completion": "2024", "delivery_scope": "General contracting" }, "sources": [ { "url": "https://www.clarkconstruction.com/our-work/projects/va6-data-center", "title": "Clark: VA6 Data Center", "accessed": "2026-11-11", "fields": [ "delivery_models", "markets", "named_clients", "dc_track_record", "reference_project", "completion", "delivery_scope", "company_type" ] }, { "url": "https://www.clarkconstruction.com/sites/default/files/2023-11/Superstructure%20Fall%202023.pdf", "title": "Clark Superstructure newsletter, Fall 2023", "accessed": "2026-11-11", "fields": [ "dc_track_record", "project_capacity" ] }, { "url": "https://www.clarkconstruction.com/our-work/expertise/self-perform", "title": "Clark: Self-perform entities", "accessed": "2026-11-11", "fields": [ "self_perform", "self_perform_electrical" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "clayco", "name": "Clayco", "url": "https://claycorp.com/", "summary": "Chicago design-builder with 10.2 GW of data center capacity delivered or underway and 72 active data center projects, self-performing concrete for clients including Galaxy Digital, Related Digital and Equinix.", "hq": "US", "tags": [ "us", "design-build", "hyperscale", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": 6, "enr_telecom_revenue_usd_m": 4706.2, "enr_top400_rank": 20, "enr_top400_rank_prev": 21, "telecom_share_pct": 58, "cmar_share_pct": 0, "total_revenue_usd_m": 8100, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "Design-build", "design_build": true, "cm_at_risk": null, "self_perform": "Concrete", "self_perform_electrical": null, "markets": "North America", "dc_track_record": "10.20 GW delivered or underway (combined measure); 72 active data center projects; $42B mission critical revenue delivered or underway", "dc_mw_claimed": 10200, "named_clients": "Galaxy Digital (Helios, for tenant CoreWeave), Related Digital, Equinix, AT&T", "ownership": null, "employees": null, "headquarters": "Chicago, IL, US", "delivery_scope": "Site selection, utility planning, design, procurement, modular systems, concrete and construction" }, "sources": [ { "url": "https://claycorp.com/work/mission-critical", "title": "Clayco: Mission Critical", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build", "self_perform", "markets", "dc_track_record", "dc_mw_claimed", "named_clients", "delivery_scope", "company_type" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "enr_telecom_rank", "enr_telecom_revenue_usd_m" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "clune-construction", "name": "Clune Construction", "url": "https://www.clunegc.com/", "summary": "Employee-owned Chicago builder with 1.4 GW+ of active data center projects and $2.6 billion of 2025 mission critical volume, building for Serverfarm, Stream and Prime Data Centers.", "hq": "US", "founded": 1997, "tags": [ "us", "cm-at-risk", "employee-owned", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": 14, "enr_telecom_revenue_usd_m": 2570, "enr_top400_rank": 45, "enr_top400_rank_prev": 58, "telecom_share_pct": 71, "cmar_share_pct": 67, "total_revenue_usd_m": 3595, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk", "design_build": null, "cm_at_risk": true, "self_perform": null, "self_perform_electrical": null, "markets": "North America", "dc_track_record": "1.4 GW+ in active projects; $2.6B mission critical volume in 2025; 500+ mission critical team members", "dc_mw_claimed": 1400, "named_clients": "Serverfarm, Stream Data Centers, Prime Data Centers", "ownership": "Employee-owned", "employees": null, "headquarters": "Chicago, IL, US" }, "sources": [ { "url": "https://www.clunegc.com/", "title": "Clune Construction home", "accessed": "2026-11-11", "fields": [ "ownership", "markets" ] }, { "url": "https://www.clunegc.com/sector/mission-critical/", "title": "Clune: Mission Critical", "accessed": "2026-11-11", "fields": [ "dc_track_record", "dc_mw_claimed", "named_clients", "company_type" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "enr_telecom_rank", "enr_telecom_revenue_usd_m", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "collen-construction", "name": "Collen Construction", "url": "https://www.collen.com/", "summary": "Dublin design-and-build contractor that has delivered 600 MW+ of hyperscale and colocation capacity since 2010 across Ireland, the UK and Europe.", "hq": "IE", "tags": [ "europe", "design-build", "hyperscale" ], "fields": { "company_type": "Design-build specialist", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": null, "enr_top400_rank_prev": null, "telecom_share_pct": null, "cmar_share_pct": null, "total_revenue_usd_m": null, "revenue_year": null, "revenue_note": null, "delivery_models": "Design-build", "design_build": true, "cm_at_risk": null, "self_perform": null, "self_perform_electrical": null, "markets": "Europe", "dc_track_record": "600 MW+ of hyperscale and colocation capacity delivered since 2010", "dc_mw_claimed": 600, "named_clients": null, "ownership": null, "employees": null, "headquarters": "Dublin, Ireland", "delivery_scope": "Design-build and commissioning" }, "sources": [ { "url": "https://www.collen.com/sectors/data-centres-technology", "title": "Collen: Data Centres & Technology", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build", "markets", "dc_track_record", "dc_mw_claimed", "delivery_scope", "company_type" ] }, { "url": "https://www.collen.com/contact", "title": "Collen: Contact", "accessed": "2026-11-11", "fields": [ "headquarters" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "cpb-contractors", "name": "CPB Contractors", "url": "https://www.cpbcon.com.au/", "summary": "Australian contractor recruiting its project delivery team for a data centre project in Kurri Kurri, New South Wales.", "hq": "AU", "tags": [ "APAC" ], "fields": { "company_type": "General contractor", "markets": "APAC", "reference_project": "Kurri Kurri Data Center, Hunter Region, NSW, Australia", "delivery_scope": "Project construction scheduling and site delivery; CPB NSW/ACT Building team", "project_status": "Project delivery recruitment advertised on access date; completion not established" }, "sources": [ { "url": "https://careers.pageuppeople.com/mob/434/cimic/en/job/1006412/planner-kurri-kurri-data-center", "title": "CPB Contractors: Kurri Kurri Data Center project recruitment", "accessed": "2026-11-11", "fields": [ "company_type", "markets", "reference_project", "delivery_scope", "project_status" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "dpr-construction", "name": "DPR Construction", "url": "https://www.dpr.com/", "summary": "Self-performing general contractor with 2,716 mission critical projects since 1990, 202 of them design-build, building for Digital Realty, QTS, Meta, Vantage and Crusoe in the US and Europe.", "hq": "US", "founded": 1990, "tags": [ "us", "europe", "design-build", "cm-at-risk", "self-perform-electrical", "hyperscale", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": 4, "enr_telecom_revenue_usd_m": 8059.4, "enr_top400_rank": 7, "enr_top400_rank_prev": 8, "telecom_share_pct": 57, "cmar_share_pct": 90, "total_revenue_usd_m": 14036, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk, Design-build, Preconstruction", "design_build": true, "cm_at_risk": true, "self_perform": "Concrete, Electrical, Drywall/interiors, Sitework", "self_perform_electrical": true, "markets": "North America, Europe", "dc_track_record": "2,716 mission critical projects since 1990, 202 of them design-build; mission critical was 31% of 2024 revenue", "dc_mw_claimed": null, "named_clients": "Digital Realty, QTS, Meta, Vantage Data Centers, CoreSite, CyrusOne, Crusoe, DataBank, Interxion", "ownership": null, "employees": null, "headquarters": "Santa Clara, CA, US", "reference_project": "Vantage WA13, Quincy, Washington, United States", "project_capacity": "64 MW delivered at WA13; project total, not company-wide MW", "completion": "Final phases four and five turned over in fall 2025" }, "sources": [ { "url": "https://www.dpr.com/construction/mission-critical", "title": "DPR: Mission Critical", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build", "markets", "dc_track_record", "named_clients", "company_type" ] }, { "url": "https://www.dpr.com/construction/expertise/self-perform-work", "title": "DPR: Self-Perform Work", "accessed": "2026-11-11", "fields": [ "self_perform", "self_perform_electrical" ] }, { "url": "https://www.dpr.com/projects/vantage-data-centers-wa13-project", "title": "dpr.com: vantage data centers wa13 project", "accessed": "2026-11-11", "fields": [ "reference_project", "project_capacity", "completion" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "enr_telecom_rank", "enr_telecom_revenue_usd_m", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "ellisdon", "name": "EllisDon", "url": "https://www.ellisdon.com/", "summary": "Canadian general contractor that built Ericsson’s 56 MW data centre in Vaudreuil-Dorion, Québec through its EllisDon DIVCO joint venture.", "hq": "CA", "tags": [], "fields": { "company_type": "General contractor", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": null, "enr_top400_rank_prev": null, "telecom_share_pct": null, "cmar_share_pct": null, "total_revenue_usd_m": null, "revenue_year": null, "revenue_note": null, "delivery_models": "General contracting, Preconstruction", "design_build": null, "cm_at_risk": null, "self_perform": "Concrete, Demolition, Carpentry, Light civil (Southwestern Ontario special projects)", "self_perform_electrical": null, "markets": "North America", "dc_track_record": "Ericsson Data Centre, Vaudreuil-Dorion, Québec: 56 MW ground-up facility through the EllisDon DIVCO joint venture", "dc_mw_claimed": null, "named_clients": "Ericsson Canada", "ownership": null, "employees": null, "headquarters": null, "reference_project": "Ericsson Data Centre, Vaudreuil-Dorion, Québec, Canada", "project_capacity": "56 MW facility capacity; source does not distinguish IT load from total electrical capacity", "delivery_scope": "Ground-up data center through EllisDon DIVCO joint venture" }, "sources": [ { "url": "https://www.ellisdon.com/project/hyperscale-data-center-program", "title": "EllisDon: Hyperscale Data Center Program", "accessed": "2026-11-11", "fields": [ "delivery_models" ] }, { "url": "https://www.londonspecialprojects.ellisdon.com/", "title": "EllisDon Special Projects: Self-perform advantage", "accessed": "2026-11-11", "fields": [ "self_perform" ] }, { "url": "https://www.divco.ca/en/project/ericsson-data-centre", "title": "DIVCO: Ericsson Data Centre", "accessed": "2026-11-11", "fields": [ "markets", "named_clients", "dc_track_record", "reference_project", "project_capacity", "delivery_scope", "company_type" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "equans-data-centers", "name": "Equans Data Centers", "url": "https://www.equansdatacenters.com/", "summary": "Bouygues group data center contractor with 640 MW+ of IT capacity delivered, covering engineering, construction, substations, fit-out and five-stage commissioning for operators such as Colt DCS.", "hq": "FR", "tags": [ "europe" ], "fields": { "company_type": "Design-build specialist", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": null, "enr_top400_rank_prev": null, "telecom_share_pct": null, "cmar_share_pct": null, "total_revenue_usd_m": null, "revenue_year": null, "revenue_note": null, "delivery_models": "Design, Construction, Commissioning", "design_build": null, "cm_at_risk": null, "self_perform": "In-house installation teams (individual trades not specified)", "self_perform_electrical": null, "markets": "Europe", "dc_track_record": "640 MW+ of IT capacity delivered; Colt DCS PAR2 (40 MW, two phases) near Paris", "dc_mw_claimed": 640, "named_clients": "Colt Data Centre Services", "ownership": "Subsidiary of listed group", "employees": null, "headquarters": null, "reference_project": "Colt DCS PAR2, Villebon, Paris region, France", "project_capacity": "40 MW planned PAR2 facility, delivered in two phases; initial phase 20 MW", "delivery_scope": "Engineering, construction, substation, fit-out and five-stage commissioning" }, "sources": [ { "url": "https://www.equansdatacenters.com/press-releases/colt-dcs-selects-equans-data-centers-strategic-partner-pioneering-liquid-cooling", "title": "Colt DCS selects Equans Data Centers as strategic partner", "accessed": "2026-11-11", "fields": [ "markets", "ownership", "dc_track_record", "dc_mw_claimed", "named_clients", "reference_project", "project_capacity", "delivery_scope", "company_type" ] }, { "url": "https://www.equansdatacenters.com/our-expertise/build", "title": "Equans Data Centers: Build, in-house installation teams", "accessed": "2026-11-11", "fields": [ "self_perform" ] }, { "url": "https://www.equansdatacenters.com/sites/g/files/tkmtob271/files/2023-11/NEW_Equans-Data-Center-Brochure-2023_WEB.pdf", "title": "Equans: Data center design, build and commissioning brochure", "accessed": "2026-11-11", "fields": [ "delivery_models" ] }, { "url": "https://www.kraftanlagen.com/wp-content/uploads/brochure/Equans-Data-Centers-Brochure_EN.pdf", "title": "Equans Data Centers brochure (PDF)", "accessed": "2026-11-11", "fields": [ "delivery_scope" ] }, { "url": "https://datacentre.me/newsletter/colt-dcs-selects-equans-data-centres-as-strategic-partner-for-pioneering-liquid-cooling-facility-in-paris/", "title": "Colt DCS selects Equans Data Centres (press release)", "accessed": "2026-11-11", "fields": [ "reference_project", "project_capacity" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "exyte", "name": "Exyte", "url": "https://www.exyte.net/", "summary": "German design-build specialist for advanced-technology facilities that booked close to €750 million in 2026 for three Frankfurt-area data centers totalling about 80 MW, with offsite manufacturing and digital commissioning.", "hq": "DE", "tags": [ "europe", "design-build", "hyperscale" ], "fields": { "company_type": "Design-build specialist", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": null, "enr_top400_rank_prev": null, "telecom_share_pct": null, "cmar_share_pct": null, "total_revenue_usd_m": null, "revenue_year": null, "revenue_note": null, "delivery_models": "Design-build", "design_build": true, "cm_at_risk": null, "self_perform": "Prefab/modular (Exentec subsidiary; capabilities across markets)", "self_perform_electrical": null, "markets": "Europe", "dc_track_record": "Three Frankfurt-area projects, about 80 MW combined IT load, close to €750M order intake booked for 2026, completion by 2028", "dc_mw_claimed": null, "named_clients": null, "ownership": null, "employees": null, "headquarters": null, "reference_project": "Three data center projects in Greater Frankfurt, Germany", "project_capacity": "Approximately 80 MW combined IT load across the three awarded projects", "completion": "All three projects scheduled for completion by 2028", "delivery_scope": "New facilities and expansions, including work inside operating data centers" }, "sources": [ { "url": "https://www.exyte.net/Newsroom/Exyte-secures-three-major-AI-driven-data-center-projects-near-Frankfurt", "title": "Exyte secures three major AI-driven data center projects near Frankfurt", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build", "markets", "dc_track_record", "reference_project", "project_capacity", "completion", "delivery_scope", "company_type" ] }, { "url": "https://www.exyte.net/Locations/Europe", "title": "Exyte: Europe, EPC and Exentec modular manufacturing", "accessed": "2026-11-11", "fields": [ "self_perform" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "fdc-construction-and-fitout", "name": "FDC Construction & Fitout", "url": "https://www.fdcbuilding.com.au/", "summary": "Australian builder that converted an industrial building into AirTrunk’s 84 MW+ Melbourne hyperscale facility in 52 weeks using prefabricated electrical and mechanical modules.", "hq": "AU", "tags": [ "apac", "hyperscale" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": null, "enr_top400_rank_prev": null, "telecom_share_pct": null, "cmar_share_pct": null, "total_revenue_usd_m": null, "revenue_year": null, "revenue_note": null, "delivery_models": "Design and construction", "design_build": null, "cm_at_risk": null, "self_perform": null, "self_perform_electrical": null, "markets": "APAC", "dc_track_record": "AirTrunk Melbourne: 84 MW+ facility, 34 data halls, delivered in 52 weeks with off-site prefabricated MEP; NEXTDC B2 Brisbane", "dc_mw_claimed": null, "named_clients": "AirTrunk, NEXTDC", "ownership": null, "employees": null, "headquarters": null, "reference_project": "AirTrunk Melbourne, Victoria, Australia", "project_capacity": "More than 84 MW total facility capacity; not a company-wide total", "delivery_scope": "Industrial-building conversion with off-site prefabricated MEP" }, "sources": [ { "url": "https://www.fdcbuilding.com.au/projects/airtrunk/", "title": "FDC: AirTrunk", "accessed": "2026-11-11", "fields": [ "markets", "named_clients", "dc_track_record", "reference_project", "project_capacity", "delivery_scope", "company_type" ] }, { "url": "https://www.fdcbuilding.com.au/expertise/", "title": "FDC: Data centre design and construction expertise", "accessed": "2026-11-11", "fields": [ "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "fluor", "name": "Fluor", "url": "https://www.fluor.com/", "summary": "Engineer-constructor that sells full EPC delivery for data center campuses, signed with TeraWulf for a Kentucky campus with up to 480 MW of grid power, and has built 60 MW halls in Finland and the Netherlands.", "hq": "US", "tags": [ "us", "europe", "apac", "epc", "design-build", "hyperscale", "enr-ranked" ], "fields": { "company_type": "Engineer-constructor (EPC)", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": 9, "enr_top400_rank_prev": 7, "telecom_share_pct": 0, "cmar_share_pct": 0, "total_revenue_usd_m": 10888.3, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "EPC, General contracting", "design_build": true, "cm_at_risk": null, "self_perform": "Prefab/modular (offshore fabrication yards; data center deployment not established)", "self_perform_electrical": null, "markets": "North America, Europe, APAC", "dc_track_record": "EPC for TeraWulf’s Kentucky campus (up to 480 MW grid power, three buildings); general contractor for two 60 MW data centers in Finland; construction manager for two 60 MW data centers in the Netherlands", "dc_mw_claimed": null, "named_clients": "TeraWulf", "ownership": null, "employees": null, "headquarters": "Irving, TX, US", "reference_project": "Justified Data Campus, Hawesville, Kentucky, United States", "project_status": "Definitive EPC contract announced 2026-11-04; early works begun", "delivery_scope": "Engineering, procurement and construction" }, "sources": [ { "url": "https://www.fluor.com/market-reach/industries/technology/data-centers", "title": "Fluor: Data Centers", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build", "markets", "dc_track_record", "named_clients", "company_type" ] }, { "url": "https://newsroom.fluor.com/news-releases/news-details/2026/Fluor-Signs-EPC-Contract-with-TeraWulf-for-Large-Scale-Data-Center-Campus-in-Kentucky/default.aspx", "title": "Fluor signs EPC contract with TeraWulf", "accessed": "2026-11-11", "fields": [ "named_clients", "reference_project", "project_status", "delivery_scope" ] }, { "url": "https://www.fluor.com/services-and-expertise/innovation-and-expertise/technologies-and-processes/offshore-fabrication", "title": "Fluor: Self-perform fabrication yards", "accessed": "2026-11-11", "fields": [ "self_perform" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "fortis-construction", "name": "Fortis Construction", "url": "https://fortisconstruction.com/", "summary": "Portland builder with 92% of its 2025 revenue in data centers and telecom, No. 10 on ENR’s data center list, building hyperscale halls in the US and a 40 MW campus in Finland.", "hq": "US", "tags": [ "us", "europe", "cm-at-risk", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": 10, "enr_telecom_revenue_usd_m": 3289.9, "enr_top400_rank": 46, "enr_top400_rank_prev": 57, "telecom_share_pct": 92, "cmar_share_pct": 74, "total_revenue_usd_m": 3590.4, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk", "design_build": null, "cm_at_risk": true, "self_perform": null, "self_perform_electrical": null, "markets": "North America, Europe", "dc_track_record": "Construction manager for a 40 MW, four-phase data center campus in Mäntsälä, Finland", "dc_mw_claimed": null, "named_clients": null, "ownership": null, "employees": null, "headquarters": "Portland, OR, US" }, "sources": [ { "url": "https://fortisconstruction.com/project/confidential-client-finland-data-center/", "title": "Fortis: Confidential client data center, Finland", "accessed": "2026-11-11", "fields": [ "markets", "dc_track_record", "company_type" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "enr_telecom_rank", "enr_telecom_revenue_usd_m", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "gammon-construction", "name": "Gammon Construction", "url": "https://www.gammonconstruction.com/", "summary": "Builds multi-storey data centres in Asia, including Global Switch’s Woodlands facility in Singapore, with precast structures and off-site MEP assembly.", "hq": "HK", "tags": [ "APAC" ], "fields": { "company_type": "General contractor", "markets": "APAC", "reference_project": "Global Switch Singapore Woodlands data centre", "delivery_scope": "Six-storey precast structure with 10 data suites; over 70% of the structure precast off-site and over 60% of MEP works assembled off-site, using BIM", "named_clients": "Global Switch", "self_perform": "Prefab/modular (MEP assembled off-site by Gammon)", "delivery_models": "Design-build", "design_build": true }, "sources": [ { "url": "https://www.gammonconstruction.com/en/project-details.php?project_id=136", "title": "Gammon: Global Switch Singapore Woodlands project", "accessed": "2026-11-11", "fields": [ "company_type", "markets", "reference_project", "named_clients", "delivery_scope", "self_perform" ] }, { "url": "https://www.gammonconstruction.com/uploaded_files/publication/2/130/Gammon%20SR2023_Final_31%20May%202024.pdf", "title": "Gammon Sustainability Report 2023: Design and construction of Woodlands data centre", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "gilbane-building-company", "name": "Gilbane Building Company", "url": "https://www.gilbaneco.com/", "summary": "Family-owned since 1870, with 4,000+ employees and 45+ offices, Gilbane builds data centers by design-build, IPD or construction management, including powered-base buildings for Digital Realty.", "hq": "US", "founded": 1870, "tags": [ "us", "design-build", "cm-at-risk", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": 19, "enr_top400_rank_prev": 17, "telecom_share_pct": 2, "cmar_share_pct": 78, "total_revenue_usd_m": 8138.9, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk, Design-build, IPD", "design_build": true, "cm_at_risk": true, "self_perform": null, "self_perform_electrical": null, "markets": "North America", "dc_track_record": null, "dc_mw_claimed": null, "named_clients": "Digital Realty", "ownership": "Privately held", "employees": 4000, "headquarters": "Providence, RI, US", "reference_project": "Digital Realty Trust Data Center, Massachusetts, United States", "delivery_scope": "Construction management for core, shell and powered base building infrastructure" }, "sources": [ { "url": "https://www.gilbaneco.com/", "title": "Gilbane home (family-owned since 1870, 4,000+ employees, delivery methods)", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build", "ownership", "employees", "company_type" ] }, { "url": "https://www.gilbaneco.com/projects/digital-realty-trust-data-center/", "title": "Gilbane: Digital Realty Trust data center", "accessed": "2026-11-11", "fields": [ "markets", "named_clients", "reference_project", "delivery_scope" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "glencar-construction", "name": "Glencar Construction", "url": "https://www.glencar.com/", "summary": "Contractor delivering the final cold-shell phase of Pure DC’s Brent Cross data centre campus in North London.", "hq": "GB", "tags": [ "europe" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": null, "enr_top400_rank_prev": null, "telecom_share_pct": null, "cmar_share_pct": null, "total_revenue_usd_m": null, "revenue_year": null, "revenue_note": null, "delivery_models": "General contracting (Contractor Alliance with ESG)", "design_build": null, "cm_at_risk": null, "self_perform": null, "self_perform_electrical": null, "markets": "Europe", "dc_track_record": "West Cold Shell of Pure DC LON01B2, Brent Cross: foundations, utilities, frame, envelope and roof for a 70 MW facility", "dc_mw_claimed": null, "named_clients": "Pure DC", "ownership": null, "employees": null, "headquarters": null, "reference_project": "Pure DC LON01B2 West Cold Shell, Brent Cross, North London, United Kingdom", "project_capacity": "70 MW LON01B2 facility; source says eventual campus total 90 MW. Glencar’s scope is the shell, not the full energized facility.", "project_status": "Piling commenced as of 2026-09-02", "completion": "Building 2 scheduled Q2 2029", "delivery_scope": "West Cold Shell: foundations, utilities, frame, envelope and roof" }, "sources": [ { "url": "https://www.glencar.com/news-articles/glencar-starts-piling-on-final-build-phase-of-pure-dcs-1bn-brent-cross-data-centre-campus/", "title": "Glencar starts piling on final build phase of Pure DC’s Brent Cross campus", "accessed": "2026-11-11", "fields": [ "markets", "named_clients", "dc_track_record", "reference_project", "project_capacity", "project_status", "completion", "delivery_scope", "company_type" ] }, { "url": "https://www.glencar.com/news-articles/glencar-awarded-project-to-build-20mw-london-facility-for-vantage-data-centers/", "title": "Glencar: Vantage LHR21 contractor appointment", "accessed": "2026-11-11", "fields": [ "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "gray", "name": "Gray", "url": "https://www.gray.com/", "summary": "Lexington design-builder with 1,900 MW+ of data center capacity delivered across 45+ completed data centers; design, engineering and construction stay in-house and its NexGen arm self-performs concrete, steel and mechanical.", "hq": "US", "founded": 1960, "tags": [ "us", "design-build", "cm-at-risk", "hyperscale", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": 15, "enr_telecom_revenue_usd_m": 2515, "enr_top400_rank": 30, "enr_top400_rank_prev": 36, "telecom_share_pct": 47, "cmar_share_pct": 64, "total_revenue_usd_m": 5327.7, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk, Design-build", "design_build": true, "cm_at_risk": true, "self_perform": "Concrete, Steel, Mechanical", "self_perform_electrical": null, "markets": "North America", "dc_track_record": "1,900 MW+ of new capacity delivered for data center customers; 45+ completed data centers", "dc_mw_claimed": 1900, "named_clients": "QTS Data Centers", "ownership": null, "employees": null, "headquarters": "Lexington, KY, US" }, "sources": [ { "url": "https://www.gray.com/markets/data-centers/", "title": "Gray: Data Centers", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build", "markets", "dc_track_record", "dc_mw_claimed", "named_clients", "company_type" ] }, { "url": "https://www.gray.com/self-perform-services/", "title": "Gray: Self-perform services (NexGen)", "accessed": "2026-11-11", "fields": [ "self_perform" ] }, { "url": "https://www.gray.com/", "title": "Gray home", "accessed": "2026-11-11", "fields": [] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "enr_telecom_rank", "enr_telecom_revenue_usd_m", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "hensel-phelps", "name": "Hensel Phelps", "url": "https://www.henselphelps.com/", "summary": "Colorado builder with 160+ mission critical projects worth $21 billion+ and 34 million sq ft completed, including Meta’s Montgomery, Alabama data center.", "hq": "US", "tags": [ "us", "cm-at-risk", "hyperscale", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": 11, "enr_telecom_revenue_usd_m": 2973.2, "enr_top400_rank": 11, "enr_top400_rank_prev": 13, "telecom_share_pct": 28, "cmar_share_pct": 48, "total_revenue_usd_m": 10783.6, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk", "design_build": null, "cm_at_risk": true, "self_perform": "Concrete, Sitework, Carpentry, Doors and hardware, Demolition", "self_perform_electrical": null, "markets": "North America", "dc_track_record": "160+ mission critical projects; $21B+ total value; 34M+ sq ft completed", "dc_mw_claimed": null, "named_clients": "Meta", "ownership": null, "employees": null, "headquarters": "Greeley, CO, US", "reference_project": "Meta Montgomery data center, Alabama, United States", "completion": "Scheduled for end of 2026 in the 2024-05-09 announcement; completion not established by this source" }, "sources": [ { "url": "https://www.henselphelps.com/industry/mission-critical/", "title": "Hensel Phelps: Mission Critical", "accessed": "2026-11-11", "fields": [ "markets", "dc_track_record", "company_type" ] }, { "url": "https://www.henselphelps.com/meta-awards-hensel-phelps-montgomery-data-center/", "title": "Meta awards Hensel Phelps Montgomery data center", "accessed": "2026-11-11", "fields": [ "named_clients", "reference_project", "completion" ] }, { "url": "https://www.henselphelps.com/what-we-do/construction/", "title": "Hensel Phelps: Self-perform construction services", "accessed": "2026-11-11", "fields": [ "self_perform" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "enr_telecom_rank", "enr_telecom_revenue_usd_m", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "hitt-contracting", "name": "HITT Contracting", "url": "https://www.hitt.com/", "summary": "The No. 1 data center contractor on ENR’s 2026 telecom ranking: $10.65 billion of its $13.04 billion 2025 revenue came from the sector, all delivered as construction manager at risk from 16 US offices.", "hq": "US", "tags": [ "us", "cm-at-risk", "hyperscale", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": 1, "enr_telecom_revenue_usd_m": 10653.5, "enr_top400_rank": 8, "enr_top400_rank_prev": 10, "telecom_share_pct": 82, "cmar_share_pct": 100, "total_revenue_usd_m": 13036.6, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk", "design_build": null, "cm_at_risk": true, "self_perform": "Some work self-performed; trades not specified", "self_perform_electrical": null, "markets": "North America", "dc_track_record": "Builds data center campuses nationwide; Project Cowboy in Council Bluffs, Iowa delivered 4.5 MW of critical power in 11 months", "dc_mw_claimed": null, "named_clients": null, "ownership": null, "employees": null, "headquarters": "Falls Church, VA, US", "reference_project": "Confidential Project Cowboy, Council Bluffs, Iowa, United States", "project_capacity": "4.5 MW critical power at Project Cowboy", "completion": "2020" }, "sources": [ { "url": "https://www.hitt.com/", "title": "HITT Contracting home", "accessed": "2026-11-11", "fields": [ "markets", "dc_track_record", "company_type" ] }, { "url": "https://www.hitt.com/projects/data-center-project-cowboy/", "title": "HITT: Data Center Project Cowboy", "accessed": "2026-11-11", "fields": [ "dc_track_record", "reference_project", "project_capacity", "completion" ] }, { "url": "https://www.hitt.com/careers/", "title": "HITT: Careers FAQ, skilled trades and self-performance", "accessed": "2026-11-11", "fields": [ "self_perform" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "enr_telecom_rank", "enr_telecom_revenue_usd_m", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "hoffman-construction", "name": "Hoffman Construction", "url": "https://www.hoffmancorp.com/", "summary": "Employee-owned Oregon builder of hyperscale data center clusters in Quincy, Prineville, Altoona and San Antonio, now staffing a 1 GW+ campus in Claude, Texas.", "hq": "US", "founded": 1922, "tags": [ "us", "employee-owned", "hyperscale", "cm-at-risk", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": 31, "enr_top400_rank_prev": 26, "telecom_share_pct": 0, "cmar_share_pct": 56, "total_revenue_usd_m": 5013.3, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk", "design_build": null, "cm_at_risk": true, "self_perform": "Concrete, Steel, Mechanical, I&C commissioning (in-house divisions)", "self_perform_electrical": null, "markets": "North America", "dc_track_record": "Data center clusters and campuses in Quincy WA, Prineville OR, Altoona IA and San Antonio TX; recruiting for a 1 GW+ hyperscale campus in Claude, Texas", "dc_mw_claimed": null, "named_clients": null, "ownership": "Employee-owned", "employees": null, "headquarters": "Lake Oswego, OR, US", "reference_project": "Hyperscale data center campus, Claude, Texas, United States", "project_capacity": "1+ GW advertised campus scale; groundbreaking/recruitment page, not delivered capacity" }, "sources": [ { "url": "https://www.hoffmancorp.com/projects/data-centers/", "title": "Hoffman: Data Centers", "accessed": "2026-11-11", "fields": [ "markets", "dc_track_record", "company_type" ] }, { "url": "https://www.hoffmancorp.com/texas-recruiting/", "title": "Hoffman: Texas recruiting", "accessed": "2026-11-11", "fields": [ "ownership", "dc_track_record", "reference_project", "project_capacity" ] }, { "url": "https://www.hoffmancorp.com/our-services/", "title": "Hoffman: In-house self-perform services", "accessed": "2026-11-11", "fields": [ "self_perform" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "holder-construction", "name": "Holder Construction", "url": "https://www.holderconstruction.com/", "summary": "Atlanta builder that earns 83% of its revenue from data centers and telecom, ranked No. 3 on ENR’s 2026 telecom list, delivering hyperscale campuses across the US as construction manager or design-builder.", "hq": "US", "tags": [ "us", "cm-at-risk", "design-build", "hyperscale", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": 3, "enr_telecom_revenue_usd_m": 8527, "enr_top400_rank": 12, "enr_top400_rank_prev": 15, "telecom_share_pct": 83, "cmar_share_pct": 92, "total_revenue_usd_m": 10234, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk, Design-build", "design_build": true, "cm_at_risk": true, "self_perform": "Concrete, Carpentry, Hot aisle containment, Modular wall systems", "self_perform_electrical": null, "markets": "North America", "dc_track_record": "610+ data and telecom projects and $76B of volume (website counters, undated); page text says 6.4 GW+ delivered across the US while its headline counter reads 12.9 GW", "dc_mw_claimed": null, "named_clients": null, "ownership": null, "employees": null, "headquarters": "Atlanta, GA, US", "delivery_scope": "Construction management and design-build" }, "sources": [ { "url": "https://www.holderconstruction.com/data-telecom", "title": "Holder: Data & Telecom", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build", "markets", "dc_track_record", "delivery_scope", "company_type" ] }, { "url": "https://www.holderconstruction.com/expertise", "title": "Holder: Self-perform expertise", "accessed": "2026-11-11", "fields": [ "self_perform" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "enr_telecom_rank", "enr_telecom_revenue_usd_m", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "hutchinson-builders", "name": "Hutchinson Builders", "url": "https://www.hutchinsonbuilders.com.au/", "summary": "Australian builder delivering data centres on a design and construct basis since 2010, with projects for Global Switch, Telstra and Keppel.", "hq": "AU", "tags": [ "APAC" ], "fields": { "company_type": "General contractor", "markets": "APAC", "reference_project": "Keppel Data Centre", "project_capacity": "3.7MW power", "project_area_sqm": 5300, "delivery_scope": "Design and construct; first data centre delivered on a design and construct basis in 2010", "design_build": true, "delivery_models": "Design-build", "self_perform": "Concrete, Formwork, Crane and hoist operations" }, "sources": [ { "url": "https://www.hutchinsonbuilders.com.au/projects/commercial/data-centres", "title": "Hutchinson Builders: Data Centres", "accessed": "2026-11-11", "fields": [ "design_build", "delivery_scope", "reference_project", "project_capacity", "project_area_sqm", "markets", "company_type", "delivery_models" ] }, { "url": "https://www.hutchinsonbuilders.com.au/uploads/HB-CO-CapabilityStatement-2023-WeAreHutchies-3-EmailQuality.pdf", "title": "Hutchinson Builders: 2023 capability statement, in-house labour", "accessed": "2026-11-11", "fields": [ "self_perform" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "hyundai-ec", "name": "Hyundai Engineering & Construction", "url": "https://en.hdec.kr/", "summary": "Builds Korean data centres and provides preconstruction services, with references including K Square Gasan and Naver GAK Sejong.", "hq": "KR", "tags": [ "APAC" ], "fields": { "company_type": "General contractor", "markets": "APAC", "delivery_models": "General contracting, Preconstruction", "reference_project": "K Square Data Center Gasan, Seoul, South Korea", "named_clients": "Koramco Asset Management, Naver, KT, NH, KB Financial Group", "delivery_scope": "Construction, preconstruction planning and design support through commissioning", "dc_track_record": "K Square Gasan completion reported by contractor; other named references include Naver GAK Sejong and KT Mokdong IDC" }, "sources": [ { "url": "https://newsroom.hdec.kr/en/company/press_view.aspx?CompanyPressSeq=595", "title": "Hyundai E&C: Korean data center construction and preconstruction services", "accessed": "2026-11-11", "fields": [ "company_type", "markets", "delivery_models", "reference_project", "named_clients", "delivery_scope", "dc_track_record" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "implenia", "name": "Implenia", "url": "https://implenia.com/en/", "summary": "Swiss general and total contractor that builds data centres from shell and core through turnkey building services, with a run of campuses around Zurich.", "hq": "CH", "tags": [ "Europe" ], "fields": { "company_type": "General contractor", "markets": "Europe", "reference_project": "Data centre building-services fit-out for a global provider of sustainable digital infrastructure, Switzerland (after Implenia built the shell)", "project_status": "Under way (announced 4 November 2026)", "completion": "2028 planned", "project_area_sqm": 33000, "delivery_scope": "General and total contractor covering the full value chain from analysis and planning through to operation; turnkey construction and commissioning of complete building services", "delivery_models": "General and total contracting", "dc_track_record": "Swiss data centre portfolio includes Lupin 4, ZUR02, MCZ N, MCZ M and ZUR3" }, "sources": [ { "url": "https://implenia.com/en/data-center-construction/", "title": "Implenia: Data center construction", "accessed": "2026-11-11", "fields": [ "delivery_scope", "markets", "company_type", "delivery_models", "dc_track_record" ] }, { "url": "https://implenia.com/en/media/news-article/implenia-wins-contract-for-technical-fit-out-of-a-data-centre-in-switzerland/", "title": "Implenia: Swiss data centre technical fit-out award, 4 November 2026", "accessed": "2026-11-11", "fields": [ "delivery_scope", "reference_project", "project_area_sqm", "project_status", "completion" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "je-dunn", "name": "JE Dunn Construction", "url": "https://jedunn.com/", "summary": "Kansas City builder that delivered more than 720 MW of data center capacity in 2024 alone, ranked No. 13 on ENR’s 2026 data center list and builds for Meta.", "hq": "US", "tags": [ "us", "cm-at-risk", "hyperscale", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": 13, "enr_telecom_revenue_usd_m": 2686, "enr_top400_rank": 21, "enr_top400_rank_prev": 18, "telecom_share_pct": 33, "cmar_share_pct": 83, "total_revenue_usd_m": 8048, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk", "design_build": null, "cm_at_risk": true, "self_perform": "Concrete, Steel, Sitework, Drywall/interiors, Carpentry, Low-voltage, Prefab/modular, Commissioning", "self_perform_electrical": null, "markets": "North America", "dc_track_record": "More than 720 MW delivered in calendar 2024 (annual, not cumulative); 285+ mission critical projects; $8.5B mission critical contracted (undated website totals)", "dc_mw_claimed": 720, "named_clients": "Meta", "ownership": null, "employees": null, "headquarters": "Kansas City, MO, US" }, "sources": [ { "url": "https://jedunn.com/markets/mission-critical/", "title": "JE Dunn: Mission Critical", "accessed": "2026-11-11", "fields": [ "markets", "dc_track_record", "dc_mw_claimed", "named_clients", "company_type" ] }, { "url": "https://jedunn.com/services/self-perform/", "title": "JE Dunn: Self-perform scopes and offsite manufacturing", "accessed": "2026-11-11", "fields": [ "self_perform" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "enr_telecom_rank", "enr_telecom_revenue_usd_m", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "john-paul-construction", "name": "John Paul Construction", "url": "https://www.johnpaul.ie/", "summary": "Irish contractor appointed in 2026 to build NTT Global Data Centers’ FRA3H near Frankfurt, a 6 MW colocation building.", "hq": "IE", "tags": [ "europe" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": null, "enr_top400_rank_prev": null, "telecom_share_pct": null, "cmar_share_pct": null, "total_revenue_usd_m": null, "revenue_year": null, "revenue_note": null, "delivery_models": "Design-build", "design_build": true, "cm_at_risk": null, "self_perform": null, "self_perform_electrical": null, "markets": "Europe", "dc_track_record": "FRA3H, Rüsselsheim near Frankfurt: 6 MW planned colocation facility, 2 MW per floor; appointment announced March 2026", "dc_mw_claimed": null, "named_clients": "NTT Global Data Centers", "ownership": null, "employees": null, "headquarters": null, "reference_project": "FRA3H, Rüsselsheim near Frankfurt, Germany", "project_capacity": "6 MW planned colocation facility; 2 MW per floor", "project_status": "Appointment announced 2026-03-26; completion not established in this announcement" }, "sources": [ { "url": "https://www.johnpaul.ie/fra3h/", "title": "John Paul Construction: FRA3H", "accessed": "2026-11-11", "fields": [ "markets", "named_clients", "dc_track_record", "reference_project", "project_capacity", "project_status", "company_type" ] }, { "url": "https://www.johnpaul.ie/case-studies/9mw-high-capacity-data-centre-west-dublin/", "title": "John Paul Construction: DUB04 full design and build", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "john-sisk-and-son", "name": "John Sisk & Son", "url": "https://sisk.com/", "summary": "Irish contractor with 25+ years of data centre delivery in Ireland, the UK and Europe, working as general contractor, construction manager or design-and-build contractor, including Vantage’s DUB1 campus.", "hq": "IE", "tags": [ "europe", "design-build", "cm-at-risk" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": null, "enr_top400_rank_prev": null, "telecom_share_pct": null, "cmar_share_pct": null, "total_revenue_usd_m": null, "revenue_year": null, "revenue_note": null, "delivery_models": "General contracting, CM at risk, Design-build", "design_build": true, "cm_at_risk": true, "self_perform": null, "self_perform_electrical": null, "markets": "Europe", "dc_track_record": "25+ years of data centre delivery; projects in northern Sweden, Copenhagen (20 MW), Dublin (Vantage DUB1) and a five-building hyperscale campus in the Netherlands", "dc_mw_claimed": null, "named_clients": "Vantage Data Centres", "ownership": null, "employees": null, "headquarters": null, "reference_project": "Copenhagen Data Centre, Denmark", "project_capacity": "20 MW project capacity", "project_status": "Handed over; client is confidential", "delivery_scope": "Shell, core, fit-out, CSA, MEP, telecom, security and integrated systems testing" }, "sources": [ { "url": "https://sisk.com/sectors/data-ict", "title": "Sisk: Data & ICT", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build", "cm_at_risk", "markets", "named_clients", "dc_track_record", "company_type" ] }, { "url": "https://sisk.com/what-we-do/projects/copenhagen-data-centre-denmark", "title": "Sisk: Copenhagen Data Centre", "accessed": "2026-11-11", "fields": [ "dc_track_record", "reference_project", "project_capacity", "project_status", "delivery_scope" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "kajima", "name": "Kajima", "url": "https://www.kajima.co.jp/english/", "summary": "Japanese general contractor building Princeton Digital Group’s close-to-100 MW campus in Saitama for developer Lendlease.", "hq": "JP", "tags": [ "apac", "hyperscale" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": null, "enr_top400_rank_prev": null, "telecom_share_pct": null, "cmar_share_pct": null, "total_revenue_usd_m": null, "revenue_year": null, "revenue_note": null, "delivery_models": "Design-build", "design_build": true, "cm_at_risk": null, "self_perform": null, "self_perform_electrical": null, "markets": "APAC", "dc_track_record": "Appointed contractor for Princeton Digital Group’s Saitama City campus, close to 100 MW of planned IT capacity (2022 announcement)", "dc_mw_claimed": null, "named_clients": "Princeton Digital Group, Lendlease", "ownership": null, "employees": null, "headquarters": null, "reference_project": "Princeton Digital Group campus, Saitama City, Japan; Lendlease development", "project_capacity": "Close to 100 MW IT capacity planned across phased development; 2022 announcement, not proof of completed capacity", "completion": "Announced phase scheduled for 2024; actual handover not verified by this historical release", "delivery_scope": "Appointed construction contractor; Nikken Sekkei is the designer" }, "sources": [ { "url": "https://www.kajima.co.jp/tech/data_center/index.html", "title": "Kajima: Data center design and construction services", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build" ] }, { "url": "https://www.lendlease.com/contentassets/e1b7e9a3b7804c9cad7b27641fa7254e/documents/aquila-groundbreaking-ceremony.pdf", "title": "Lendlease: Aquila groundbreaking ceremony", "accessed": "2026-11-11", "fields": [ "markets", "named_clients", "dc_track_record", "reference_project", "project_capacity", "completion", "delivery_scope", "company_type" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "kapitol-group", "name": "Kapitol Group", "url": "https://www.kapitol.com/", "summary": "Australian builder behind NEXTDC’s Tier IV D1 and D2 Darwin data centres and GE1 Geelong, using off-site prefabrication and modular construction.", "hq": "AU", "tags": [ "apac" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": null, "enr_top400_rank_prev": null, "telecom_share_pct": null, "cmar_share_pct": null, "total_revenue_usd_m": null, "revenue_year": null, "revenue_note": null, "delivery_models": "General contracting, Design management", "design_build": null, "cm_at_risk": null, "self_perform": null, "self_perform_electrical": null, "markets": "APAC", "dc_track_record": "NEXTDC D1 Darwin (8 MW, Tier IV, completed July 2024), D2 Darwin, GE1 Geelong (under construction) and the M3 portfolio", "dc_mw_claimed": null, "named_clients": "NEXTDC", "ownership": null, "employees": null, "headquarters": null, "reference_project": "NEXTDC D1, Darwin, Northern Territory, Australia", "project_capacity": "8 MW facility capacity", "completion": "July 2024", "delivery_scope": "Modular construction and off-site prefabrication" }, "sources": [ { "url": "https://www.kapitol.com/our-projects/industrial/nextdc-d1-darwin-data-centre", "title": "Kapitol: NEXTDC D1 Darwin data centre", "accessed": "2026-11-11", "fields": [ "markets", "named_clients", "dc_track_record", "reference_project", "project_capacity", "completion", "delivery_scope", "company_type" ] }, { "url": "https://www.kapitol.com/our-projects/industrial/nextdc-d2-darwin-data-centre", "title": "Kapitol: NEXTDC D2 construction and design management", "accessed": "2026-11-11", "fields": [ "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "kiewit", "name": "Kiewit", "url": "https://www.kiewit.com/", "summary": "Omaha engineer-constructor, No. 4 on ENR’s 2026 Top 400, building hyperscale campuses and the power behind them; it is joint general contractor with Clayco on Project Jupiter for Oracle and STACK in New Mexico.", "hq": "US", "tags": [ "us", "hyperscale", "enr-ranked", "epc" ], "fields": { "company_type": "Engineer-constructor (EPC)", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": 4, "enr_top400_rank_prev": 3, "telecom_share_pct": 4, "cmar_share_pct": 17, "total_revenue_usd_m": 15282.1, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk, General contracting", "design_build": null, "cm_at_risk": true, "self_perform": "Self-performs over 80% of its work; individual trades not specified on data center page", "self_perform_electrical": null, "markets": "North America", "dc_track_record": "Joint general contractor with Clayco on Project Jupiter, Doña Ana County, New Mexico; first portion topped out October 2026", "dc_mw_claimed": null, "named_clients": "Oracle, STACK Infrastructure", "ownership": null, "employees": null, "headquarters": "Omaha, NE, US", "reference_project": "Project Jupiter, Doña Ana County, New Mexico, United States", "project_status": "First portion topped out 2026-10-22; campus construction not stated complete", "delivery_scope": "Joint general contractor with Clayco for a portion of the campus" }, "sources": [ { "url": "https://www.kiewit.com/newsroom/clayco-and-kiewit-reach-major-construction-milestone-at-project-jupiter-data-center-campus/", "title": "Kiewit: Clayco and Kiewit reach milestone at Project Jupiter", "accessed": "2026-11-11", "fields": [ "delivery_models", "markets", "named_clients", "dc_track_record", "reference_project", "project_status", "delivery_scope", "company_type" ] }, { "url": "https://www.kiewit.com/our-markets/industrial/data-centers/", "title": "Kiewit: Data centers, self-perform benefits", "accessed": "2026-11-11", "fields": [ "self_perform" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "laing-orourke", "name": "Laing O’Rourke", "url": "https://www.laingorourke.com/", "summary": "Builds data centres in the UK, United Arab Emirates and Australia with in-house CSA, MEP and commissioning teams.", "hq": "GB", "tags": [ "Europe, Middle East, APAC" ], "fields": { "company_type": "General contractor", "markets": "Europe, Middle East, APAC", "delivery_models": "Design and construction, Offsite manufacture", "self_perform": "Civil, Structural, Architectural, Mechanical, Electrical, Prefab/modular, Commissioning", "self_perform_electrical": true, "dc_track_record": "300 MW in the last 20 years, as stated on the data centres sector page", "dc_mw_claimed": 300 }, "sources": [ { "url": "https://www.laingorourke.com/projects-and-sectors/data-centres/", "title": "Laing O’Rourke: Data centres sector and in-house delivery", "accessed": "2026-11-11", "fields": [ "company_type", "markets", "delivery_models", "self_perform", "self_perform_electrical", "dc_track_record", "dc_mw_claimed" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "larsen-and-toubro", "name": "Larsen & Toubro (L&T Construction)", "url": "https://www.larsentoubro.com/", "summary": "Indian engineering and construction group whose Buildings & Factories business designs, builds, installs, tests and commissions data centres including fit-outs.", "hq": "IN", "tags": [ "apac", "design-build", "epc" ], "fields": { "company_type": "Engineer-constructor (EPC)", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": null, "enr_top400_rank_prev": null, "telecom_share_pct": null, "cmar_share_pct": null, "total_revenue_usd_m": null, "revenue_year": null, "revenue_note": null, "delivery_models": "Design-build", "design_build": true, "cm_at_risk": null, "self_perform": null, "self_perform_electrical": null, "markets": "APAC", "dc_track_record": "Data centre orders in Mumbai and Navi Mumbai totalling 10.8 MW (July 2022 award), design-build through commissioning", "dc_mw_claimed": null, "named_clients": null, "ownership": null, "employees": null, "headquarters": null, "reference_project": "Data center orders in Mumbai and Navi Mumbai, India", "project_capacity": "10.8 MW combined contracted capacity in the July 2022 award; completed MW not confirmed", "project_status": "Orders secured in announcement dated 2022-07-11", "delivery_scope": "Design, build, supply, installation, testing and commissioning including fit-outs" }, "sources": [ { "url": "https://www.larsentoubro.com/pressreleases/2022/2022-07-11-lt-construction-awarded-significant-contracts-for-its-buildings-factories-business", "title": "L&T Construction awarded significant contracts (July 2022)", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build", "markets", "dc_track_record", "reference_project", "project_capacity", "project_status", "delivery_scope", "company_type" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "lendlease", "name": "Lendlease", "url": "https://www.lendlease.com/", "summary": "Constructs Australian data centres, including the 60 MW Project Blue Tongue facility in Sydney.", "hq": "AU", "tags": [ "APAC" ], "fields": { "company_type": "General contractor", "markets": "APAC", "reference_project": "Project Blue Tongue, Sydney, NSW, Australia", "project_capacity": "60 MW facility; future provision for a second 60 MW building", "delivery_models": "General contracting", "delivery_scope": "Construction of a three-storey data centre on a 105,000 m² site" }, "sources": [ { "url": "https://www.lendlease.com/data-centres/project-blue-tongue/", "title": "Lendlease: Project Blue Tongue construction overview", "accessed": "2026-11-11", "fields": [ "company_type", "markets", "reference_project", "project_capacity", "delivery_models", "delivery_scope" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "mace", "name": "Mace Construct", "url": "https://www.macegroup.com/", "summary": "International contractor building the cold shell for Pure DC’s Brent Cross campus in North London.", "hq": "GB", "tags": [ "europe" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": null, "enr_top400_rank_prev": null, "telecom_share_pct": null, "cmar_share_pct": null, "total_revenue_usd_m": null, "revenue_year": null, "revenue_note": null, "delivery_models": "General contracting (cold-shell construction)", "design_build": null, "cm_at_risk": null, "self_perform": null, "self_perform_electrical": null, "markets": "Europe", "dc_track_record": "Cold-shell construction of Building 2 at Pure DC’s Brent Cross (LON01) campus, ready for later fit-out", "dc_mw_claimed": null, "named_clients": "Pure DC", "ownership": null, "employees": null, "headquarters": null, "reference_project": "Pure DC Brent Cross LON01 Building 2, North London, United Kingdom", "project_capacity": "Source describes 70 MW planned campus capacity; shell preparation does not establish energized IT capacity", "delivery_scope": "Cold-shell construction for Building 2, enabling later fit-out", "corporate_status": "Trading as Mace Construct on access date; Forco brand scheduled January 2027" }, "sources": [ { "url": "https://www.macegroup.com/en-us/projects/pure-dc-brent-cross-campus/", "title": "Mace: Pure DC Brent Cross campus", "accessed": "2026-11-11", "fields": [ "markets", "named_clients", "dc_track_record", "reference_project", "project_capacity", "delivery_scope", "delivery_models", "company_type" ] }, { "url": "https://www.macegroup.com/news/mace-construct-to-become-forco-from-january-2027/", "title": "macegroup.com: mace construct to become forco from january 2027", "accessed": "2026-11-11", "fields": [ "corporate_status" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "mccarthy-building-companies", "name": "McCarthy Building Companies", "url": "https://www.mccarthy.com/", "summary": "100% employee-owned builder that self-performs concrete, electrical, mechanical and civil work, and is topping out data centers such as Vantage’s 64 MW NV12 near Reno.", "hq": "US", "tags": [ "us", "cm-at-risk", "self-perform-electrical", "employee-owned", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": 22, "enr_top400_rank_prev": 20, "telecom_share_pct": 10, "cmar_share_pct": 47, "total_revenue_usd_m": 7996.9, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk", "design_build": null, "cm_at_risk": true, "self_perform": "Concrete, Electrical, Mechanical, Sitework, Drywall/interiors", "self_perform_electrical": true, "markets": "North America", "dc_track_record": null, "dc_mw_claimed": null, "named_clients": "Vantage Data Centers", "ownership": "Employee-owned", "employees": null, "headquarters": "St. Louis, MO, US", "reference_project": "Vantage NV12, Storey County near Reno, Nevada, United States", "project_capacity": "64 MW NV12 facility; not a completed-delivery total", "project_status": "Topped out; construction ongoing in release dated 2026-01-22" }, "sources": [ { "url": "https://www.mccarthy.com/our-approach/self-perform", "title": "McCarthy: Self-Perform", "accessed": "2026-11-11", "fields": [ "self_perform", "self_perform_electrical" ] }, { "url": "https://www.mccarthy.com/", "title": "McCarthy home (employee ownership, locations)", "accessed": "2026-11-11", "fields": [ "ownership", "markets" ] }, { "url": "https://www.mccarthy.com/insights/mccarthy-building-companies-celebrates-topping-out-of-nv12-project-at-vantage-data-centers", "title": "McCarthy celebrates topping out of NV12 at Vantage Data Centers", "accessed": "2026-11-11", "fields": [ "named_clients", "reference_project", "project_capacity", "project_status", "company_type" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "mercury-engineering", "name": "Mercury Engineering", "url": "https://www.mercuryeng.com/", "summary": "Dublin contractor that runs general contracting, CSA, mechanical, electrical and offsite assembly under one roof, and handed over Digital Realty’s 76 MW Paris Digital Park in 2025.", "hq": "IE", "tags": [ "europe", "hyperscale" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": null, "enr_top400_rank_prev": null, "telecom_share_pct": null, "cmar_share_pct": null, "total_revenue_usd_m": null, "revenue_year": null, "revenue_note": null, "delivery_models": "General contracting", "design_build": null, "cm_at_risk": null, "self_perform": "Mechanical, Prefab/modular (bespoke fabrication facility)", "self_perform_electrical": null, "markets": "Europe", "dc_track_record": "General contractor for Paris Digital Park, La Courneuve: 76 MW across PAR8–PAR11, full campus handed over in 2025; data centers in Germany, France and the Netherlands", "dc_mw_claimed": null, "named_clients": "Digital Realty", "ownership": null, "employees": null, "headquarters": "Dublin, Ireland", "reference_project": "Paris Digital Park, La Courneuve, France", "project_capacity": "76 MW delivered across PAR8, PAR9, PAR10 and PAR11", "completion": "Full campus handed over in 2025", "delivery_scope": "General contractor for shell-and-core, MEP fit-out and commissioning" }, "sources": [ { "url": "https://www.mercuryeng.com/", "title": "Mercury home", "accessed": "2026-11-11", "fields": [ "delivery_models", "markets", "headquarters", "company_type" ] }, { "url": "https://www.mercuryeng.com/project/paris-digital-park-data-centre-campus/", "title": "Mercury: Paris Digital Park", "accessed": "2026-11-11", "fields": [ "named_clients", "dc_track_record", "reference_project", "project_capacity", "completion", "delivery_scope" ] }, { "url": "https://www.mercuryeng.com/services/mechanical/", "title": "Mercury: Mechanical services and off-site fabrication", "accessed": "2026-11-11", "fields": [ "self_perform" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "mortenson", "name": "Mortenson", "url": "https://www.mortenson.com/", "summary": "Minneapolis builder with 11 GW of data center capacity completed or under construction and 1,000+ data center specialists; it climbed from No. 22 to No. 10 on ENR’s 2026 Top 400 with 45% of 2025 revenue in data centers and telecom.", "hq": "US", "tags": [ "us", "cm-at-risk", "hyperscale", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": 5, "enr_telecom_revenue_usd_m": 4833.1, "enr_top400_rank": 10, "enr_top400_rank_prev": 22, "telecom_share_pct": 45, "cmar_share_pct": 60, "total_revenue_usd_m": 10845.4, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk", "design_build": null, "cm_at_risk": true, "self_perform": "Concrete, Carpentry, Drywall/interiors", "self_perform_electrical": null, "markets": "North America", "dc_track_record": "11 GW completed or under construction and 1,000+ data center experts (company figures). QTS Chicago: 14 MW deployed to date in the case study; 40 MW ultimate building capacity; construction manager for redevelopment, expansion and substation", "dc_mw_claimed": 11000, "named_clients": "QTS", "ownership": null, "employees": null, "headquarters": "Minneapolis, MN, US", "reference_project": "QTS Chicago campus, Illinois, United States", "project_capacity": "14 MW deployed to date as stated on the case study; 40 MW ultimate building capacity", "completion": "Original data hall July 2016; new data hall June 2021", "delivery_scope": "Construction manager; redevelopment, expansion and new substation" }, "sources": [ { "url": "https://www.mortenson.com/data-centers", "title": "Mortenson: Data Centers", "accessed": "2026-11-11", "fields": [ "dc_track_record", "dc_mw_claimed", "markets", "company_type" ] }, { "url": "https://www.mortenson.com/projects/qts-data-center", "title": "Mortenson: QTS Chicago data center", "accessed": "2026-11-11", "fields": [ "named_clients", "reference_project", "project_capacity", "completion", "delivery_scope", "dc_track_record" ] }, { "url": "https://www.mortenson.com/careers/minneapolis-office/carpenter-foreman-22049", "title": "Mortenson: Carpenter Foreman, self-performed scopes", "accessed": "2026-11-11", "fields": [ "self_perform" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "enr_telecom_rank", "enr_telecom_revenue_usd_m", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "multiplex", "name": "Multiplex", "url": "https://www.multiplex.global/", "summary": "Builds large data centres across Australia for NEXTDC and GreenSquareDC, including the 350 MW S4 Sydney campus at Horsley Park.", "hq": "AU", "tags": [ "APAC" ], "fields": { "company_type": "General contractor", "markets": "APAC", "reference_project": "NEXTDC S4 Sydney, Horsley Park", "project_capacity": "350MW planned", "project_status": "Under construction (works began March 2026)", "completion": "Mid-2027", "named_clients": "NEXTDC, GreenSquareDC", "delivery_models": "Early Contractor Involvement, Design-build", "design_build": true, "dc_track_record": "NEXTDC S4 Sydney: 350 MW planned campus; construction began March 2026, completion scheduled mid-2027" }, "sources": [ { "url": "https://www.multiplex.global/projects/nextdc-s4-sydney/", "title": "Multiplex: NEXTDC S4 Sydney, design and construct contract", "accessed": "2026-11-11", "fields": [ "company_type", "markets", "delivery_models", "design_build", "reference_project", "project_capacity", "project_status", "completion", "dc_track_record" ] }, { "url": "https://www.multiplex.global/news/work-commences-on-nextdcs-350mw-western-sydney-data-centre/", "title": "Multiplex: NEXTDC S4 groundbreaking, 17 March 2026", "accessed": "2026-11-11", "fields": [ "completion", "project_status" ] }, { "url": "https://itbrief.com.au/story/multiplex-starts-construction-on-nextdc-s-s4-sydney", "title": "IT Brief Australia: Multiplex starts construction on NEXTDC's S4 Sydney", "accessed": "2026-11-11", "fields": [ "reference_project", "project_capacity", "project_status", "completion", "named_clients", "markets", "company_type" ] }, { "url": "https://www.itnews.com.au/news/greensquaredc-signs-multiplex-for-data-centre-build-598498", "title": "iTnews: GreenSquareDC signs Multiplex for data centre build", "accessed": "2026-11-11", "fields": [ "named_clients" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "obayashi", "name": "Obayashi", "url": "https://www.obayashi.co.jp/en/", "summary": "Japanese general contractor that handles data centers from site search and volume study through design and construction, including NEC’s Kobe data center.", "hq": "JP", "tags": [ "apac", "design-build" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": null, "enr_top400_rank_prev": null, "telecom_share_pct": null, "cmar_share_pct": null, "total_revenue_usd_m": null, "revenue_year": null, "revenue_note": null, "delivery_models": "Design-build", "design_build": true, "cm_at_risk": null, "self_perform": null, "self_perform_electrical": null, "markets": "APAC", "dc_track_record": "NEC Kobe Data Center, second-phase building, completed March 2019", "dc_mw_claimed": null, "named_clients": "NEC", "ownership": null, "employees": null, "headquarters": null, "reference_project": "NEC Kobe Data Center, second-phase building", "completion": "March 2019", "delivery_scope": "Site search, planning, design and construction for data centers" }, "sources": [ { "url": "https://www2024-1.obayashi.co.jp/en/solution_technology/industrial_facilities/data_center.html", "title": "Obayashi: Data Center", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build", "markets", "delivery_scope", "company_type" ] }, { "url": "https://www.obayashi.co.jp/works/detail/work_2384.html", "title": "Obayashi works: NEC Kobe Data Center", "accessed": "2026-11-11", "fields": [ "named_clients", "dc_track_record", "reference_project", "completion" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "okland-construction", "name": "Okland Construction", "url": "https://www.okland.com/", "summary": "General contractor and construction manager with a data center fit-out reference for Aligned Energy.", "hq": "US", "tags": [ "North America" ], "fields": { "company_type": "General contractor", "markets": "North America", "reference_project": "Aligned Energy Collocation Data Center", "named_clients": "Aligned Energy", "project_capacity": "10 MW critical load; Tier IV (2N) electrical and Tier III mechanical systems", "delivery_scope": "Demolition, interior MEP fit-out, new data hall and equipment yard, OFCI equipment installation and office build-out", "delivery_models": "Construction management, Design-build", "design_build": true, "self_perform": "Concrete, Sitework, Carpentry, Architectural woodwork, Doors and hardware" }, "sources": [ { "url": "https://www.okland.com/markets/technology/alligned-energy-data-center/", "title": "Okland: Aligned Energy Collocation Data Center", "accessed": "2026-11-11", "fields": [ "company_type", "markets", "reference_project", "named_clients", "project_capacity", "delivery_scope" ] }, { "url": "https://www.okland-const.com/services.cfm", "title": "Okland: Construction management, design/build and self-performed work", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build", "self_perform" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "pcl-construction", "name": "PCL Construction", "url": "https://www.pcl.com/", "summary": "100% employee-owned builder with 5,500+ people across Canada, the US and Australia; its data center work includes the 320,000 sq ft BMO data centre in Barrie, Ontario.", "hq": "US", "tags": [ "us", "employee-owned", "cm-at-risk", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": 14, "enr_top400_rank_prev": 11, "telecom_share_pct": 2, "cmar_share_pct": 39, "total_revenue_usd_m": 9854.2, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk", "design_build": null, "cm_at_risk": true, "self_perform": "Concrete, Sitework, Carpentry, Mechanical piping, Utilities, Commissioning", "self_perform_electrical": null, "markets": "North America", "dc_track_record": "BMO Data Centre, Barrie, Ontario: 320,000 sq ft building with a 60,000 sq ft data center expandable to 100,000 sq ft", "dc_mw_claimed": null, "named_clients": "Bank of Montreal", "ownership": "Employee-owned", "employees": 5500, "headquarters": "Denver, CO, US (PCL Construction Enterprises)", "reference_project": "BMO Data Centre, Barrie, Ontario, Canada" }, "sources": [ { "url": "https://www.pcl.com/", "title": "PCL home", "accessed": "2026-11-11", "fields": [ "ownership", "employees" ] }, { "url": "https://www.pcl.com/us/en/our-work/bmo-data-centre", "title": "PCL: BMO Data Centre", "accessed": "2026-11-11", "fields": [ "markets", "named_clients", "dc_track_record", "reference_project", "company_type" ] }, { "url": "https://www.pcl.com/ca/en/services/self-perform-capabilities0", "title": "PCL: Self-perform capabilities", "accessed": "2026-11-11", "fields": [ "self_perform" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "pomerleau", "name": "Pomerleau", "url": "https://pomerleau.ca/en", "summary": "Provides data center construction management in Canada, including projects inside operating buildings for confidential clients.", "hq": "CA", "tags": [ "North America" ], "fields": { "company_type": "General contractor", "markets": "North America", "reference_project": "Data-centric critical infrastructure project, Montreal region, Québec, Canada", "completion": "2026 listed as year built", "delivery_scope": "Construction management", "delivery_models": "Construction management", "self_perform": "Concrete, Formwork, Civil works" }, "sources": [ { "url": "https://pomerleau.ca/en/projects/project/data-centric-collaborative-project-critical-infrastructure", "title": "pomerleau.ca: data centric collaborative project critical infrastructure", "accessed": "2026-11-11", "fields": [ "reference_project", "delivery_scope", "completion", "markets", "company_type", "delivery_models" ] }, { "url": "https://pomerleau.ca/en/operational-solutions", "title": "Pomerleau: Operational solutions, self-performed civil works", "accessed": "2026-11-11", "fields": [ "self_perform" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "ryan-companies", "name": "Ryan Companies", "url": "https://www.ryancompanies.com/", "summary": "Minneapolis developer-builder with 1.2 GW and 4.2 million sq ft of mission critical space delivered or under construction, combining development, design and construction in one team.", "hq": "US", "tags": [ "us", "cm-at-risk", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": 20, "enr_telecom_revenue_usd_m": 1383, "enr_top400_rank": 33, "enr_top400_rank_prev": 43, "telecom_share_pct": 29, "cmar_share_pct": 6, "total_revenue_usd_m": 4714, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk", "design_build": null, "cm_at_risk": true, "self_perform": "Concrete", "self_perform_electrical": null, "markets": "North America", "dc_track_record": "1.2 GW and 4.2M sq ft delivered or under construction. Ryan's own page cites an ENR data center ranking of #18; ENR's 2026 Top 20 telecommunications table lists it at No. 20, the rank shown here", "dc_mw_claimed": 1200, "named_clients": null, "ownership": null, "employees": null, "headquarters": "Minneapolis, MN, US" }, "sources": [ { "url": "https://www.ryancompanies.com/industries/mission-critical/", "title": "Ryan Companies: Mission Critical", "accessed": "2026-11-11", "fields": [ "markets", "dc_track_record", "dc_mw_claimed", "company_type" ] }, { "url": "https://ryancompanies.wd5.myworkdayjobs.com/ryancompanies/job/VDC-Engineer_R-101517", "title": "Ryan Companies: VDC Engineer, Self-Perform Concrete", "accessed": "2026-11-11", "fields": [ "self_perform" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "enr_telecom_rank", "enr_telecom_revenue_usd_m", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "samsung-c-and-t", "name": "Samsung C&T", "url": "https://www.samsungcnt.com/eng/", "summary": "Korean builder whose dedicated data center team runs projects from business development through design, construction and operations, including the 40MW Ansan Global Cloud Center.", "hq": "KR", "tags": [ "APAC" ], "fields": { "company_type": "General contractor", "markets": "APAC", "reference_project": "Ansan Global Cloud Center", "project_capacity": "40MW", "delivery_scope": "Dedicated data center team covering investment and business development, design, construction and operations, with preconstruction services", "named_clients": "IGIS Asset Management, Samsung Electronics, Samsung SDS", "delivery_models": "Preconstruction, Design and construction", "dc_track_record": "Ansan Global Cloud Center: 40 MW project awarded with IGIS Asset Management; not a company-wide delivered total" }, "sources": [ { "url": "https://news.samsungcnt.com/en/features/engineering-construction/2025-09-building-the-backbone-of-the-ai-era-samsung-cts-data-center-business-team/", "title": "Samsung C&T Newsroom: Building the Backbone of the AI Era, Samsung C&T's Data Center Business Team", "accessed": "2026-11-11", "fields": [ "reference_project", "project_capacity", "delivery_scope", "markets", "company_type", "delivery_models", "dc_track_record" ] }, { "url": "https://news.samsungcnt.com/en/features/engineering-construction/2024-03-cooling-data-centers-and-computer-servers-samsung-ct-finds-a-new-better-way-2/", "title": "Samsung C&T Newsroom: Cooling data centers and computer servers", "accessed": "2026-11-11", "fields": [ "named_clients" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "shapoorji-pallonji", "name": "Shapoorji Pallonji", "url": "https://www.shapoorjipallonji.com/", "summary": "Indian engineering and construction group offering data centre construction and turnkey IT-campus delivery.", "hq": "IN", "tags": [ "APAC" ], "fields": { "company_type": "General contractor", "markets": "APAC", "delivery_scope": "Data centre construction with MEP systems, precision cooling, redundant power and security infrastructure", "delivery_models": "Turnkey IT-campus construction with data centre integration", "headquarters": "Mumbai, India" }, "sources": [ { "url": "https://www.shapoorjipallonji.com/business/EngineeringAndConstruction/data-center-construction", "title": "Shapoorji Pallonji: Data center construction", "accessed": "2026-11-11", "fields": [ "company_type", "markets", "delivery_scope" ] }, { "url": "https://www.shapoorjipallonji.com/business/EngineeringAndConstruction/it-sez-parks-construction", "title": "Shapoorji Pallonji: Turnkey IT parks and data center integration", "accessed": "2026-11-11", "fields": [ "delivery_models" ] }, { "url": "https://www.shapoorjipallonji.com/contacts", "title": "Shapoorji Pallonji: Head office", "accessed": "2026-11-11", "fields": [ "headquarters" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "shimizu", "name": "Shimizu Corporation", "url": "https://www.shimz.co.jp/en/", "summary": "Constructs data centers and other technology buildings, including large multistorey facilities in Japan.", "hq": "JP", "tags": [ "APAC" ], "fields": { "company_type": "General contractor", "markets": "APAC", "reference_project": "Data Center New Building, Gunma, Japan", "completion": "February 2016; construction started December 2014", "project_area_sqm": 39170, "delivery_models": "General contracting", "dc_track_record": "Gunma Data Center New Building: 39,170 m², completed February 2016" }, "sources": [ { "url": "https://www.shimz.co.jp/en/works/jp_off_201602_datacenternewbuilding.html", "title": "shimz.co.jp: jp off 201602 datacenternewbuilding", "accessed": "2026-11-11", "fields": [ "reference_project", "project_area_sqm", "completion", "markets", "company_type", "delivery_models", "dc_track_record" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "skanska-usa", "name": "Skanska USA", "url": "https://www.usa.skanska.com/", "summary": "US arm of Sweden’s Skanska, which has built 240+ data centers worldwide and takes on about 500 MW of data center projects a year with 800 specialists, for clients such as Aligned, IBM and atNorth.", "hq": "US", "tags": [ "us", "europe", "cm-at-risk", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": 17, "enr_top400_rank_prev": 12, "telecom_share_pct": 12, "cmar_share_pct": 59, "total_revenue_usd_m": 8656.1, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk", "design_build": null, "cm_at_risk": true, "self_perform": null, "self_perform_electrical": null, "markets": "North America, Europe", "dc_track_record": "240+ data centers built globally; 500 MW of data center projects a year; 800 data center experts (Skanska group figures)", "dc_mw_claimed": 500, "named_clients": "Aligned Data Centers, IBM, atNorth, Peak 10", "ownership": null, "employees": null, "headquarters": "New York, NY, US" }, "sources": [ { "url": "https://www.skanska.com/fi/en/construction/building/data-centers", "title": "Skanska: Data centers", "accessed": "2026-11-11", "fields": [ "markets", "dc_track_record", "dc_mw_claimed", "named_clients", "company_type" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "sto-building-group", "name": "STO Building Group (Structure Tone)", "url": "https://stobuildinggroup.com/", "summary": "Family of builders that includes Structure Tone, Layton Construction and STO Mission Critical, ranked No. 3 on ENR’s 2026 Top 400 and No. 9 in data centers, with offices in the US, Dublin and London.", "hq": "US", "tags": [ "us", "europe", "cm-at-risk", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": 9, "enr_telecom_revenue_usd_m": 3529, "enr_top400_rank": 3, "enr_top400_rank_prev": 6, "telecom_share_pct": 23, "cmar_share_pct": 84, "total_revenue_usd_m": 15571, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk", "design_build": null, "cm_at_risk": true, "self_perform": null, "self_perform_electrical": null, "markets": "North America, Europe", "dc_track_record": "STO Mission Critical is a dedicated group company; group capabilities include MEP infrastructure, commissioning and controls in the US, Ireland, UK and Netherlands", "dc_mw_claimed": null, "named_clients": null, "ownership": null, "employees": null, "headquarters": "New York, NY, US", "reference_project": "Confidential 4.5 MW Netherlands project cited by Structure Tone Dublin", "delivery_scope": "Group capabilities include MEP infrastructure, commissioning and controls" }, "sources": [ { "url": "https://stobuildinggroup.com/", "title": "STO Building Group home", "accessed": "2026-11-11", "fields": [ "markets", "dc_track_record", "company_type" ] }, { "url": "https://stobgtheword.com/built-to-scale-stobgs-mission-critical-expertise/", "title": "STOBG: Built to scale, mission critical expertise", "accessed": "2026-11-11", "fields": [ "dc_track_record", "reference_project", "delivery_scope" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "enr_telecom_rank", "enr_telecom_revenue_usd_m", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "strabag", "name": "STRABAG", "url": "https://www.strabag.com/", "summary": "European construction group with more than 15 completed data centres, including Equinix FR16 in Frankfurt and T-Systems' cloud data centre in Biere through its Züblin subsidiary.", "hq": "AT", "tags": [ "Europe" ], "fields": { "company_type": "General contractor", "markets": "Europe", "reference_project": "T-Systems cloud data centre, Biere, phase two (built by Züblin in a joint venture with ENGIE Deutschland)", "project_area_sqm": 5400, "delivery_scope": "Joint venture with ENGIE Deutschland covering 3D-based planning, procurement, outdoor works and turnkey construction with technical building equipment and energy supply", "named_clients": "T-Systems International", "delivery_models": "Design-build", "design_build": true, "dc_track_record": "More than 15 completed data centres in Europe; Züblin references include Equinix FR16 and Mainova Webhouse" }, "sources": [ { "url": "https://www.strabag.com/en/investor-relations-en/shares-and-bonds/investment-case/high-tech", "title": "STRABAG: Investment case, high tech", "accessed": "2026-11-11", "fields": [ "markets", "company_type", "delivery_models", "design_build", "dc_track_record" ] }, { "url": "https://www.engie-deutschland.de/en/references/zublin-and-engie-deutschland-expand-t-systems-data-center", "title": "ENGIE Deutschland: Züblin and ENGIE Deutschland expand T-Systems data center", "accessed": "2026-11-11", "fields": [ "reference_project", "project_area_sqm", "named_clients", "delivery_scope" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "suffolk-construction", "name": "Suffolk Construction", "url": "https://suffolk.com/", "summary": "Boston builder that delivers all of its work as construction manager at risk and earned $2.18 billion from data centers and telecom in 2025, No. 17 on ENR’s data center list; it is building core and shell for a 200 MW campus in Maryland.", "hq": "US", "tags": [ "us", "cm-at-risk", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": 17, "enr_telecom_revenue_usd_m": 2180.9, "enr_top400_rank": 23, "enr_top400_rank_prev": 28, "telecom_share_pct": 28, "cmar_share_pct": 100, "total_revenue_usd_m": 7659.1, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk", "design_build": null, "cm_at_risk": true, "self_perform": null, "self_perform_electrical": null, "markets": "North America", "dc_track_record": "Project C3, Maryland: preconstruction, site development and core-and-shell for a 200 MW, four-building campus", "dc_mw_claimed": null, "named_clients": null, "ownership": null, "employees": null, "headquarters": "Boston, MA, US", "reference_project": "Project C3, Maryland, United States", "project_capacity": "200 MW total campus capacity; Suffolk’s stated scope is core-and-shell and site infrastructure", "delivery_scope": "Preconstruction, site development, core and shell, grading and civil utilities" }, "sources": [ { "url": "https://suffolk.com/project/project-c3-maryland/", "title": "Suffolk: Project C3, Maryland", "accessed": "2026-11-11", "fields": [ "markets", "dc_track_record", "reference_project", "project_capacity", "delivery_scope", "company_type" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "enr_telecom_rank", "enr_telecom_revenue_usd_m", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "sundt-construction", "name": "Sundt Construction", "url": "https://www.sundt.com/", "summary": "100% employee-owned builder founded in 1890 with 75+ data center projects since 1990, self-performing concrete, steel, electrical, mechanical and liquid-cooling piping in the Southwest and Texas.", "hq": "US", "founded": 1890, "tags": [ "us", "employee-owned", "self-perform-electrical", "cm-at-risk", "hyperscale", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": 42, "enr_top400_rank_prev": 46, "telecom_share_pct": 11, "cmar_share_pct": 37, "total_revenue_usd_m": 3842.7, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk", "design_build": null, "cm_at_risk": true, "self_perform": "Concrete, Steel, Electrical, Mechanical, Sitework, Prefab/modular, Commissioning", "self_perform_electrical": true, "markets": "North America", "dc_track_record": "75+ projects for data center clients since 1990; $5B+ in completed and ongoing advanced facilities projects", "dc_mw_claimed": null, "named_clients": null, "ownership": "Employee-owned", "employees": null, "headquarters": "Tempe, AZ, US" }, "sources": [ { "url": "https://www.sundt.com/what-we-build/data-centers/", "title": "Sundt: Data Centers", "accessed": "2026-11-11", "fields": [ "markets", "self_perform", "dc_track_record", "self_perform_electrical", "company_type" ] }, { "url": "https://www.sundt.com/", "title": "Sundt home (employee ownership, self-perform, history)", "accessed": "2026-11-11", "fields": [ "ownership", "self_perform" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "t5-construction-services", "name": "T5 Construction Services", "url": "https://t5datacenters.com/", "summary": "The construction arm of data center developer T5: all $1.67 billion of its 2025 revenue sat in ENR’s telecom and data center sector, ranking it No. 19 on ENR’s 2026 data center list, delivering turnkey design, procurement, construction and commissioning.", "hq": "US", "tags": [ "us", "design-build", "enr-ranked" ], "fields": { "company_type": "Design-build specialist", "enr_telecom_rank": 19, "enr_telecom_revenue_usd_m": 1666.3, "enr_top400_rank": 80, "enr_top400_rank_prev": null, "telecom_share_pct": 100, "cmar_share_pct": 0, "total_revenue_usd_m": 1666.3, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "Design-build", "design_build": true, "cm_at_risk": null, "self_perform": null, "self_perform_electrical": null, "markets": "North America", "dc_track_record": "300 MW+ developed (2021 construction services brochure; developer measure)", "dc_mw_claimed": 300, "named_clients": null, "ownership": null, "employees": null, "headquarters": "Atlanta, GA, US", "delivery_scope": "Turnkey design, procurement, construction and commissioning" }, "sources": [ { "url": "https://t5datacenters.com/wp-content/uploads/2021/09/T5_ConstructionServices_Flyer_20210903.pdf", "title": "T5 Construction Services flyer (2021)", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build", "markets", "dc_track_record", "dc_mw_claimed", "delivery_scope", "company_type" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "enr_telecom_rank", "enr_telecom_revenue_usd_m" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "taisei", "name": "Taisei Corporation", "url": "https://www.taisei.co.jp/english/", "summary": "Japanese construction contractor named as a construction partner for Vantage’s first Osaka campus, KIX1.", "hq": "JP", "tags": [ "APAC" ], "fields": { "company_type": "General contractor", "markets": "APAC", "reference_project": "Vantage KIX1 campus, Ibaraki, Osaka, Japan", "named_clients": "Vantage Data Centers", "project_capacity": "Up to 68 MW planned campus; first facility 28 MW IT load", "project_status": "Groundbreaking announced May 2024; announcement does not establish completion", "delivery_models": "Design-build", "design_build": true }, "sources": [ { "url": "https://www.taisei.co.jp/MungoBlobs/452/151/2014ITweek.pdf", "title": "Taisei: Data center design and construction exhibition capabilities, 2014", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build" ] }, { "url": "https://vantage-dc.com/fr/news/vantage-data-centers-breaks-ground-on-first-campus-in-japan/", "title": "Vantage: KIX1 groundbreaking and Taisei construction partnership", "accessed": "2026-11-11", "fields": [ "company_type", "markets", "reference_project", "named_clients", "project_capacity", "project_status" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "tata-projects", "name": "Tata Projects", "url": "https://tataprojects.com/", "summary": "Indian EPC contractor that engineers, builds and commissions data centre facilities for Microsoft and Amazon, including Microsoft’s Hyderabad data centre.", "hq": "IN", "tags": [ "apac", "epc", "design-build", "hyperscale" ], "fields": { "company_type": "Engineer-constructor (EPC)", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": null, "enr_top400_rank_prev": null, "telecom_share_pct": null, "cmar_share_pct": null, "total_revenue_usd_m": null, "revenue_year": null, "revenue_note": null, "delivery_models": "EPC", "design_build": true, "cm_at_risk": null, "self_perform": null, "self_perform_electrical": null, "markets": "APAC", "dc_track_record": "Data centre facilities for Amazon and Microsoft, including Microsoft’s Hyderabad data centre (FY2025–26 annual report)", "dc_mw_claimed": null, "named_clients": "Microsoft, Amazon", "ownership": null, "employees": null, "headquarters": null, "reference_project": "Raheja Data Center, Mumbai", "delivery_scope": "Integrated turnkey EPC delivery" }, "sources": [ { "url": "https://tataprojects.com/annual-report/25-26/business-offerings.html", "title": "Tata Projects Annual Report 2025–26: Business offerings", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build", "markets", "named_clients", "dc_track_record", "company_type" ] }, { "url": "https://tataprojects.com/web/sites/default/files/2025-08/corporate%20brochure_20x20_SmallSize_new.pdf", "title": "tataprojects.com: corporate%20brochure 20x20 SmallSize new", "accessed": "2026-11-11", "fields": [ "reference_project", "delivery_scope" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "walsh-group", "name": "The Walsh Group", "url": "https://www.walshgroup.com/", "summary": "Fourth-generation family builder from Chicago, No. 16 on ENR’s 2026 data center list with $2.25 billion of sector revenue, building colocation and hyperscale campuses in Wisconsin, Indiana, Illinois and Arizona.", "hq": "US", "tags": [ "us", "design-build", "cm-at-risk", "hyperscale", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": 16, "enr_telecom_revenue_usd_m": 2252.5, "enr_top400_rank": 16, "enr_top400_rank_prev": 16, "telecom_share_pct": 25, "cmar_share_pct": 16, "total_revenue_usd_m": 8907.5, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk, Design-build, Preconstruction", "design_build": true, "cm_at_risk": true, "self_perform": "Concrete, Steel, Sitework, Carpentry, Masonry, Utilities, Demolition", "self_perform_electrical": null, "markets": "North America", "dc_track_record": "Lists 14 data center projects, from colocation facilities to hyperscale campuses in Wisconsin, Indiana, Illinois, Arizona and New York", "dc_mw_claimed": null, "named_clients": null, "ownership": "Privately held", "employees": null, "headquarters": "Chicago, IL, US" }, "sources": [ { "url": "https://www.walshgroup.com/", "title": "Walsh Group home", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build", "ownership", "company_type" ] }, { "url": "https://www.walshgroup.com/ourexperience/building/datacenters.html", "title": "Walsh: Data Centers", "accessed": "2026-11-11", "fields": [ "markets", "dc_track_record" ] }, { "url": "https://www.walshgroup.com/ourservices.html", "title": "Walsh: Services and self-performance", "accessed": "2026-11-11", "fields": [ "self_perform" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "enr_telecom_rank", "enr_telecom_revenue_usd_m", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "turner-construction", "name": "Turner Construction", "url": "https://www.turnerconstruction.com/", "summary": "The largest US builder by revenue and the No. 2 data center builder on ENR’s 2026 telecom ranking, building hyperscale and AI campuses as construction manager at risk, with its own crews for concrete, drywall and site civil work.", "hq": "US", "tags": [ "us", "cm-at-risk", "hyperscale", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": 2, "enr_telecom_revenue_usd_m": 9334.4, "enr_top400_rank": 1, "enr_top400_rank_prev": 1, "telecom_share_pct": 33, "cmar_share_pct": 80, "total_revenue_usd_m": 28299.3, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk", "design_build": null, "cm_at_risk": true, "self_perform": "Concrete, Drywall/interiors, Sitework", "self_perform_electrical": null, "markets": "North America", "dc_track_record": null, "dc_mw_claimed": null, "named_clients": "CoreWeave", "ownership": null, "employees": null, "headquarters": "New York, NY, US", "reference_project": "CoreWeave Lancaster data center, Pennsylvania, United States", "project_capacity": "100 MW initial; potential expansion to 300 MW", "project_status": "Future construction announced 2025-07-21; this release does not establish completion", "delivery_scope": "Construction through a Turner–Wohlsen joint venture" }, "sources": [ { "url": "https://www.turnerconstruction.com/services/self-perform-operations", "title": "Turner: Self-Perform Operations", "accessed": "2026-11-11", "fields": [ "self_perform" ] }, { "url": "https://www.turnerconstruction.com/insights/coreweave-announces-multi-billion-dollar-commitment-to-ai-infrastructure-in-pennsylvania", "title": "CoreWeave announces multi-billion-dollar commitment to AI infrastructure in Pennsylvania (Turner–Wohlsen JV)", "accessed": "2026-11-11", "fields": [ "named_clients", "markets", "reference_project", "project_capacity", "project_status", "delivery_scope", "company_type" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "enr_telecom_rank", "enr_telecom_revenue_usd_m", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "walbridge", "name": "Walbridge", "url": "https://www.walbridge.com/", "summary": "Detroit builder with 45% of 2025 revenue in data centers and telecom, No. 12 on ENR’s data center list; it self-performs concrete and builds hyperscale and 32 MW core-and-shell data centers.", "hq": "US", "tags": [ "us", "cm-at-risk", "hyperscale", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": 12, "enr_telecom_revenue_usd_m": 2791.5, "enr_top400_rank": 26, "enr_top400_rank_prev": 24, "telecom_share_pct": 45, "cmar_share_pct": 50, "total_revenue_usd_m": 6150, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk", "design_build": null, "cm_at_risk": true, "self_perform": "Concrete", "self_perform_electrical": null, "markets": "North America", "dc_track_record": "Two 155,000 sq ft, 32 MW core-and-shell data centers in Ohio; construction manager on a hyperscale facility in Virginia", "dc_mw_claimed": null, "named_clients": "Delta Dental of Michigan, Compuware", "ownership": null, "employees": null, "headquarters": "Detroit, MI, US", "reference_project": "Two confidential core-and-shell data centers, Ohio, United States", "project_capacity": "Source describes two “32MW 8 POD” core-and-shell buildings; 32 MW is quoted per described building, not asserted as delivered IT load", "delivery_scope": "Core-and-shell construction plus data hall build-outs in existing campus buildings" }, "sources": [ { "url": "https://www.walbridge.com/", "title": "Walbridge home", "accessed": "2026-11-11", "fields": [ "self_perform", "markets" ] }, { "url": "https://www.walbridge.com/market/mission-critical/", "title": "Walbridge: Mission Critical", "accessed": "2026-11-11", "fields": [ "dc_track_record", "named_clients", "company_type" ] }, { "url": "https://www.walbridge.com/project/mission-critical-customer-two-core-shell-data-centers/", "title": "walbridge.com: mission critical customer two core shell data centers", "accessed": "2026-11-11", "fields": [ "reference_project", "project_capacity", "delivery_scope" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "enr_telecom_rank", "enr_telecom_revenue_usd_m", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "whiting-turner", "name": "Whiting-Turner", "url": "https://www.whiting-turner.com/", "summary": "Baltimore general contractor ranked No. 5 on ENR’s 2026 Top 400 and No. 7 in data centers, with $3.9 billion of 2025 telecom and data center revenue, mostly delivered as construction manager at risk.", "hq": "US", "tags": [ "us", "cm-at-risk", "enr-ranked" ], "fields": { "company_type": "General contractor", "enr_telecom_rank": 7, "enr_telecom_revenue_usd_m": 3895.8, "enr_top400_rank": 5, "enr_top400_rank_prev": 4, "telecom_share_pct": 27, "cmar_share_pct": 71, "total_revenue_usd_m": 14675.9, "revenue_year": 2025, "revenue_note": "2025 construction revenue as reported to ENR for the 2026 Top 400 (US$ millions).", "delivery_models": "CM at risk", "design_build": null, "cm_at_risk": true, "self_perform": null, "self_perform_electrical": null, "markets": "North America", "dc_track_record": "Mission critical project portfolio includes a 54,000 sq ft warehouse converted into a 23,000 sq ft data center", "dc_mw_claimed": null, "named_clients": null, "ownership": null, "employees": null, "headquarters": "Baltimore, MD, US", "reference_project": "Confidential data center warehouse conversion; Mountain States region, United States", "delivery_scope": "Adaptive reuse, MEP installation and raised access floor" }, "sources": [ { "url": "https://www.whiting-turner.com/projects/mission-critical/confidential-data-center/", "title": "Whiting-Turner: Confidential Data Center", "accessed": "2026-11-11", "fields": [ "markets", "dc_track_record", "reference_project", "delivery_scope", "company_type" ] }, { "url": "https://www.mcdermott.com/sites/default/files/2026-06/ENR05252026_Top400.pdf", "title": "ENR Top 400 Contractors, May 25, 2026 issue (Top 400 table and Top 20 by sector: Telecommunications)", "accessed": "2026-11-11", "fields": [ "enr_top400_rank", "enr_top400_rank_prev", "total_revenue_usd_m", "revenue_year", "revenue_note", "telecom_share_pct", "cmar_share_pct", "headquarters", "cm_at_risk", "enr_telecom_rank", "enr_telecom_revenue_usd_m", "delivery_models" ] } ], "verifiedAt": "2026-11-11", "featured": false }, { "id": "winthrop-technologies", "name": "Winthrop Technologies", "url": "https://winthrop.ie/", "summary": "Dublin turnkey data centre contractor, founded in 1995 as an MEP firm, with 430 MW+ of IT load in flight across seven European countries and its own mechanical, electrical and commissioning teams.", "hq": "IE", "founded": 1995, "tags": [ "europe", "design-build", "self-perform-electrical", "hyperscale" ], "fields": { "company_type": "Design-build specialist", "enr_telecom_rank": null, "enr_telecom_revenue_usd_m": null, "enr_top400_rank": null, "enr_top400_rank_prev": null, "telecom_share_pct": null, "cmar_share_pct": null, "total_revenue_usd_m": null, "revenue_year": null, "revenue_note": null, "delivery_models": "Design-build", "design_build": true, "cm_at_risk": null, "self_perform": null, "self_perform_electrical": null, "markets": "Europe", "dc_track_record": "430 MW+ of IT load in flight across seven European countries (pipeline, not delivered); projects in Dublin, Amsterdam, Frankfurt, Sweden, Finland, Warsaw and Italy", "dc_mw_claimed": 430, "named_clients": null, "ownership": null, "employees": null, "headquarters": "Dublin, Ireland", "reference_project": "Sweden hyperscale data center, 40 MW advertised project reference", "delivery_scope": "Full turnkey design, CSA, mechanical, electrical and commissioning" }, "sources": [ { "url": "https://winthrop.ie/", "title": "Winthrop Technologies home", "accessed": "2026-11-11", "fields": [ "delivery_models", "design_build", "markets", "dc_track_record", "dc_mw_claimed", "headquarters", "reference_project", "delivery_scope", "company_type" ] } ], "verifiedAt": "2026-11-11", "featured": false } ] }