Who wins federal Environmental Consulting Services contracts
Federal agencies obligated $1.1 billion on contracts under NAICS 541620 (Environmental Consulting Services) in fiscal year 2025. The largest contractor listed was Weston Solutions INC ($84.9 million).
Who wins
| Contractor | FY2025 obligations | Share |
|---|---|---|
| Weston Solutions INC | $84.9 million | 7.4% |
| Eastern Research Group INC | $64.6 million | 5.6% |
| Project Enhancement Corporation | $48.3 million | 4.2% |
| Lynker Corporation | $44.9 million | 3.9% |
| S C & A INC | $37.7 million | 3.3% |
| Tetra Tech, Inc. | $24.1 million | 2.1% |
| Tetra Tech, Inc. | $22.6 million | 2.0% |
| Tetra Tech, Inc. | $21.5 million | 1.9% |
| Gulf South Research Corp | $16.2 million | 1.4% |
| Rpi-css, LLC | $15.1 million | 1.3% |
| Environmental Assessment Services, LLC | $14.0 million | 1.2% |
| General Dynamics Information Technology, Inc. | $13.9 million | 1.2% |
| Tetra Tech, Inc. | $13.5 million | 1.2% |
| Jacobs Geosyntec A Joint Venture | $13.5 million | 1.2% |
| Gryphon Environmental, LLC | $13.2 million | 1.2% |
| Wsp USA Environment & Infrastructure Inc. | $12.8 million | 1.1% |
| The Solution Foundry, LLC | $12.7 million | 1.1% |
| Environmental Compliance Consultants, Inc. | $12.7 million | 1.1% |
| Bluestone Environmental Group, Inc. | $12.6 million | 1.1% |
| Vernadero Group INC | $11.9 million | 1.0% |
| Absg Consulting INC | $11.6 million | 1.0% |
| The Cadmus Group LLC | $11.0 million | 1.0% |
| Weston-techlaw JV LLC | $10.8 million | 0.9% |
| Hsg, LLC | $10.7 million | 0.9% |
| Consolidated Safety Services Incorporated | $10.1 million | 0.9% |
Who buys
| Agency | FY2025 obligations | Share |
|---|---|---|
| Environmental Protection Agency | $349.8 million | 30.5% |
| Department of Defense | $275.2 million | 24.0% |
| Department of Commerce | $107.4 million | 9.4% |
| Department of the Interior | $93.8 million | 8.2% |
| Department of Energy | $75.0 million | 6.5% |
| National Aeronautics and Space Administration | $61.7 million | 5.4% |
| Department of Homeland Security | $50.1 million | 4.4% |
| Department of Transportation | $35.1 million | 3.1% |
| General Services Administration | $34.4 million | 3.0% |
| Department of Veterans Affairs | $17.3 million | 1.5% |
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Source and coverage
Source: USAspending.gov, the U.S. Treasury's public record of federal spending, retrieved 2026-11-01. Figures are contract obligations (award types A, B, C and D) for federal fiscal year 2025, October 2024 to September 2025. Covers the 100 largest NAICS codes by federal spending. This is federal money only. State, city and town contracts are not included. Obligations can be negative when earlier amounts are withdrawn, some classified work is not reported, and contractors that may be individuals are left out of the name lists, so a list is not a complete ranking of everyone paid. Pushbuild is not affiliated with any agency or company listed.