NAICS 237990
Other Heavy and Civil Engineering Construction
RampedUp holds 1,662,098 professional profiles classified to 2022 NAICS 237990 as of the build — 0.7% of all profiles carrying a NAICS classification. Of those, 851,237 carry a professional email address and 198,860 carry a mobile number. Ranked #45 of 370 codes.
What NAICS 237990 covers
This industry comprises establishments primarily engaged in heavy and civil engineering construction projects (excluding highway, street, bridge, and distribution line construction). The work performed may include new work, reconstruction, rehabilitation, and repairs. Specialty trade contractors are included in this industry if they are engaged in activities primarily related to heavy and civil engineering construction projects (excluding highway, street, bridge, distribution line, oil and gas structure, and utilities building and structure construction). Construction projects involving water resources (e.g., dredging and land drainage), development of marine facilities, and projects involving open space improvement (e.g., parks and trails) are included in this industry. Illustrative Examples: Channel construction Land drainage contractors Dam construction Marine construction Dock construction Microtunneling contractors Dredging (e.g., canal, channel, ditch, waterway) Nuclear waste disposal site construction Earth retention system construction Flood control project construction Park ground and recreational open space improvement construction Railroad construction Golf course construction Subway construction Horizontal drilling (e.g., cable, pipeline, sewer installation) Trenching, underwater Hydroelectric generating station construction Tunnel construction Cross-References. Establishments primarily engaged in--
Official 2022 NAICS definition. Sector 23 — Construction. Mapped in the RampedUp taxonomy to Civil Engineering.
What the records carry
Field coverage for NAICS 237990, August 2026 build.
| Field on the record | Records | Share of 237990 | Share across all NAICS |
|---|---|---|---|
| Professional email | 851,237 | 51.2% | 50.8% |
| Personal email | 250,893 | 15.1% | 16.0% |
| Phone (any) | 1,489,929 | 89.6% | 89.3% |
| Mobile number | 198,860 | 12.0% | 13.4% |
| Primary contact record | 1,152,881 | 69.4% | 63.9% |
| All five present on one record | 69,580 | 4.2% | 4.5% |
Counts come from the RampedUp August 2026 build. RampedUp's crosswalk maps each 6-digit 2022 NAICS code to exactly one industry in its own taxonomy, so this is that industry's population viewed under the NAICS classification — not a separate tally.
Comparable NAICS codes
The codes ranked either side of 237990 by profile count.
| # | Code | Title | Profiles | Professional email |
|---|---|---|---|---|
| 43 | 541612 | Human Resources Consulting Services | 1,700,914 | 802,910 |
| 44 | 561599 | All Other Travel Arrangement and Reservation Services | 1,690,113 | 808,171 |
| 46 | 561210 | Facilities Support Services | 1,660,064 | 705,878 |
| 47 | 624190 | Other Individual and Family Services | 1,597,781 | 582,216 |
Questions about NAICS 237990
What is NAICS code 237990?
237990 — Other Heavy and Civil Engineering Construction. This industry comprises establishments primarily engaged in heavy and civil engineering construction projects (excluding highway, street, bridge, and distribution line construction). The work performed may include new work, reconstruction, rehabilitation, and repairs. Specialty trade contractors are included in this industry if they are engaged in activities primarily related to heavy and civil engineering construction projects (excluding highway, street, bridge, distribution line, oil and gas structure, and utilities building and structure construction). Construction projects involving water resources (e.g., dredging and land drainage), development of marine facilities, and projects involving open space improvement (e.g., parks and trails) are included in this industry. Illustrative Examples: Channel construction Land drainage contractors Dam construction Marine construction Dock construction Microtunneling contractors Dredging (e.g., canal, channel, ditch, waterway) Nuclear waste disposal site construction Earth retention system construction Flood control project construction Park ground and recreational open space improvement construction Railroad construction Golf course construction Subway construction Horizontal drilling (e.g., cable, pipeline, sewer installation) Trenching, underwater Hydroelectric generating station construction Tunnel construction Cross-References. Establishments primarily engaged in--
How many contacts does RampedUp have for NAICS 237990?
1,662,098 professional profiles as of the August 2026 build, which is 0.7% of all profiles carrying a NAICS classification. Counts come from the RampedUp August 2026 build. RampedUp's crosswalk maps each 6-digit 2022 NAICS code to exactly one industry in its own taxonomy, so this is that industry's population viewed under the NAICS classification — not a separate tally.
What contact details are available for NAICS 237990?
851,237 records carry a professional email address (51.2%), 250,893 a personal email address, 1,489,929 a phone number and 198,860 a mobile number.
Need this cross-filtered?
Exact counts for NAICS 237990 on its own. For this code combined with a title level, company size or a required field, ask and we will run it against the live file.