Data center general contractors, ranked

By 2025 revenue in ENR’s 2026 telecom and data center ranking: HITT Contracting ($10.65 billion), Turner Construction ($9.33 billion), Holder Construction ($8.53 billion), DPR Construction ($8.06 billion) and Mortenson ($4.83 billion). ENR’s telecommunications sector covers data centers, cabling and towers, and ENR credits the data center buildout for its 86.4% growth in 2025. Together the top 20 billed $83.4 billion in the sector.

Sources: HITT, Turner, Holder, DPR, Mortenson

Under CM at risk the owner hires the designer and brings the builder in early under a guaranteed maximum price. HITT and Suffolk delivered 100% of 2025 revenue that way, Holder 92% and DPR 90%. Under design-build one firm carries design and construction: Clayco, Gray and Brasfield & Gorrie sell it as their main offer. EPC adds engineering and procurement of the power plant, which is how Fluor, Black & Veatch and Tata Projects contract.

Sources: HITT, Suffolk, Holder, DPR, Clayco, Gray, Fluor, Black & Veatch

DPR, McCarthy, Sundt and Laing O’Rourke publish in-house electrical capabilities. Clark lists C3M Power Systems and Black & Veatch lists Bird Electric for utility infrastructure. Turner self-performs concrete, drywall and site civil work; Gray’s NexGen arm does concrete, steel and mechanical. Ask each bidder which of those crews it will put on your site.

Sources: DPR, McCarthy, Sundt, Laing O’Rourke, Clark, Black & Veatch, Turner, Gray

Mortenson reports 11 GW completed or under construction and Clayco 10.2 GW delivered or underway. Gray reports 1,900 MW+ delivered, JE Dunn 720 MW delivered in 2024 alone, Bouygues Construction 800 MW+ and Collen 600 MW+ since 2010. The bases differ: delivered, underway and annual figures answer different questions. Reference project capacity is shown separately and keeps planned and ultimate capacity qualifiers.

Sources: Mortenson, Clayco, Gray, JE Dunn, Bouygues, Collen

In ENR’s 2026 Top 400 table, telecom and data center work made up 100% of T5 Construction’s 2025 revenue, 92% of Fortis Construction’s, 83% of Holder’s, 82% of HITT’s and 71% of Clune’s. Turner sits at 33% and Mortenson at 45%. A high share means a specialist team and supply chain; a low share means a larger general builder with a data center group inside it.

Sources: T5, Fortis, Holder, HITT, Clune

Irish builders lead: Winthrop Technologies has 430 MW+ of IT load in flight across seven countries, Collen has delivered 600 MW+, Mercury Engineering handed over Digital Realty’s 76 MW Paris Digital Park and Sisk builds for Vantage. Exyte booked about 80 MW near Frankfurt in 2026, and DPR, Fortis, Fluor and Skanska bring US and Nordic programs.

Sources: Winthrop, Collen, Mercury, Sisk, Exyte

Yes. The full table is free to reuse under CC BY 4.0 with a link to datacentergeneralcontractors.com, as CSV or JSON. Every record carries its source URLs and access dates.