Who wins federal Other Scientific and Technical Consulting Services contracts
Federal agencies obligated $2.2 billion on contracts under NAICS 541690 (Other Scientific and Technical Consulting Services) in fiscal year 2025. The largest contractor listed was Domestic Awardees (undisclosed) ($405.6 million).
Who wins
| Contractor | FY2025 obligations | Share |
|---|---|---|
| Domestic Awardees (undisclosed) | $405.6 million | 18.7% |
| Parsons Government Services Inc. | $153.4 million | 7.1% |
| Kelly Services, Inc. | $105.9 million | 4.9% |
| General Dynamics One Source LLC | $81.6 million | 3.8% |
| Lockheed Martin Corporation | $65.5 million | 3.0% |
| System High Corporation | $55.1 million | 2.5% |
| Research Triangle Institute | $47.0 million | 2.2% |
| Mantech Advanced Systems International, Inc. | $39.6 million | 1.8% |
| Tetra Tech Es, Inc. | $39.4 million | 1.8% |
| General Dynamics Information Technology, Inc. | $38.5 million | 1.8% |
| Chemonics International, Inc. | $36.3 million | 1.7% |
| Michael Stapleton Associates, Ltd. | $35.6 million | 1.6% |
| Axle Informatics, LLC | $32.0 million | 1.5% |
| Unwin Co | $31.0 million | 1.4% |
| Gap Solutions, Inc. | $29.1 million | 1.3% |
| Dependable Global Solutions, LLC | $24.1 million | 1.1% |
| Pundir Group, INC | $23.5 million | 1.1% |
| Booz Allen Hamilton INC | $23.1 million | 1.1% |
| Wsp USA Environment & Infrastructure Inc. | $21.7 million | 1.0% |
| Deloitte Consulting LLP | $21.3 million | 1.0% |
| Rmc 2021 LLC | $19.9 million | 0.9% |
| Ameresco Select, Inc. | $19.5 million | 0.9% |
| Raytheon Company | $19.3 million | 0.9% |
| Janus Research Group, LLC | $18.7 million | 0.9% |
| Essex Management LLC | $18.3 million | 0.8% |
Who buys
| Agency | FY2025 obligations | Share |
|---|---|---|
| Department of Defense | $810.9 million | 37.4% |
| Agency for International Development | $547.1 million | 25.3% |
| Department of Health and Human Services | $368.3 million | 17.0% |
| Department of Homeland Security | $81.5 million | 3.8% |
| Department of Energy | $77.4 million | 3.6% |
| Department of the Interior | $50.1 million | 2.3% |
| Department of State | $41.7 million | 1.9% |
| Department of Commerce | $33.0 million | 1.5% |
| General Services Administration | $30.0 million | 1.4% |
| Department of Veterans Affairs | $24.4 million | 1.1% |
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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.