NAICS 237990: Other Heavy and Civil Engineering Construction — Federal Contracts

What NAICS 237990 covers

The North American Industry Classification System (NAICS) is the standard the federal government uses to classify the industry of every contractor and every procurement. NAICS 237990 identifies businesses primarily engaged in other heavy and civil engineering construction. When a contracting officer publishes a solicitation on SAM.gov, they tag it with the NAICS code that best matches the work — which is why getting your NAICS portfolio right inside SAM is the single most important step for showing up in agency searches.

Who buys NAICS 237990?

The federal agencies awarding the most contract value to vendors in this NAICS, based on 106 contractors tracked in the Mindy contractor database:

1. 1Dept Of The Army
2. 2Bureau Of Reclamation
3. 3Dept Of The Navy
4. 4Bureau Of Indian Affairs
5. 5Agency For International Development

Source: aggregated from the Mindy contractor database (prime contractor disclosures via SBA + agency directories).

Top contractors in NAICS 237990

The largest prime contractors associated with NAICS 237990, ranked by total reported federal contract value. These are your most likely incumbents — and your most likely teaming partners on recompetes:

1. 1
   Thalle Construction CO INC.

   $2.9B total reported value
2. 2
   Trumbull Corporation And Brayman Construction Corporation A Joint Venture

   $978.0M total reported value
3. 3
   Great Lakes Dredge & Dock Corporation

   $793.5M total reported value
4. 4
   Aecom Technical Services INC.

   $649.3M total reported value
5. 5
   Dragados/hawaiian Dredging/orion Jv

   $440.6M total reported value
6. 6
   Weeks Marine INC.

   $398.4M total reported value
7. 7
   Walsh Group LTD. The

   $389.1M total reported value
8. 8
   Manson Construction CO.

   $282.5M total reported value

Values reflect each contractor's aggregate reported federal contract value (across all of their NAICS codes, not just 237990). Use as a ranking signal, not as a per-NAICS award total.