Department of the Interior contracts: top contractors
Contract data as of Oct 28, 2026. Refreshed daily.
The Department of the Interior obligated $6.87B in prime contracts in the last 12 months. The largest recipients were General Dynamics Information Technology, Inc. ($239.5M), Nw Construction, Inc ($138.8M), Guidehouse Inc. ($136.1M). 7 of its top 60 contractors are matched to listed companies.
← All agencies · Companies A–Z
Top 60 contractors, last 12 months
| # | Recipient | Ticker | Obligations | Share |
|---|---|---|---|---|
| 1 | General Dynamics Information Technology, Inc. | GD | $239.5M | 3% |
| 2 | Nw Construction, Inc | – | $138.8M | 2% |
| 3 | Guidehouse Inc. | – | $136.1M | 2% |
| 4 | Ames Federal Contracting Group Llc | – | $132.5M | 2% |
| 5 | Record Steel And Construction, Inc. | – | $129.8M | 2% |
| 6 | Perimeter Solutions Lp | PRM | $115.8M | 2% |
| 7 | G.S.E. Construction Company, Inc. | – | $109.5M | 2% |
| 8 | Kiewit Infrastructure West Co. | – | $103.9M | 2% |
| 9 | Flatland Energy Services Llc | – | $75.5M | 1% |
| 10 | Kbr Wyle Services, Llc | KBR | $74.3M | 1% |
| 11 | Carstensen Contracting Inc | – | $72.9M | 1% |
| 12 | Perini Management Services, Inc. | – | $72.0M | 1% |
| 13 | Accenture Federal Services Llc | – | $71.4M | 1% |
| 14 | Olsson Industrial Electric, Inc | – | $68.7M | 1% |
| 15 | Terra Site Constructors Llc | – | $64.0M | 1% |
| 16 | W. W. Clyde & Co. | – | $62.4M | 1% |
| 17 | Stone & Lime Imports, Inc | – | $61.3M | 1% |
| 18 | Booz Allen Hamilton Inc | BAH | $57.0M | 1% |
| 19 | Lumen Technologies Government Solutions, Inc. | – | $53.7M | 1% |
| 20 | Bell Textron Inc | TXT | $53.2M | 1% |
| 21 | Deep Mile Networks Llc | – | $52.0M | 1% |
| 22 | Magellan Federal, Inc. | – | $47.8M | 1% |
| 23 | Countertrade Products, Inc. | – | $39.3M | 1% |
| 24 | Nv5 Geospatial, Inc. | – | $38.1M | 1% |
| 25 | Pate Construction Co., Inc. | – | $37.0M | 1% |
| 26 | Planet Technologies, Inc. | – | $36.7M | 1% |
| 27 | Dell Federal Systems L.P | – | $36.7M | 1% |
| 28 | Seneca Strategic Partners, Llc | – | $33.5M | 0% |
| 29 | Kadiak Llc | – | $32.8M | 0% |
| 30 | Aero Spray Inc | – | $32.6M | 0% |
| 31 | Peraton Inc. | – | $31.5M | 0% |
| 32 | Woolpert, Inc. | – | $31.0M | 0% |
| 33 | Snf, Inc. | – | $30.9M | 0% |
| 34 | Bristow Llc | – | $29.9M | 0% |
| 35 | Dynanet Corporation | – | $29.2M | 0% |
| 36 | Classic Site Solutions Inc | – | $28.6M | 0% |
| 37 | Rjs Construction Inc | – | $28.6M | 0% |
| 38 | Promethean Operating I Llc | – | $28.3M | 0% |
| 39 | Mcmillen, Inc. | – | $28.3M | 0% |
| 40 | Mantech Advanced Systems International, Inc. | – | $28.3M | 0% |
| 41 | Essex Management Llc | – | $28.2M | 0% |
| 42 | Fugro Usa Land, Inc. | – | $26.9M | 0% |
| 43 | Caci, Inc. - Federal | CACI | $26.7M | 0% |
| 44 | Bridger Aerospace Group, Llc | – | $25.3M | 0% |
| 45 | Ntt Data Services Federal Government, Llc | – | $25.3M | 0% |
| 46 | Teya Support Services Llc | – | $25.1M | 0% |
| 47 | Colossal Contracting Llc | – | $24.9M | 0% |
| 48 | Henrys Aerial Service Inc | – | $24.7M | 0% |
| 49 | Snc Tallimat, Llc | – | $24.0M | 0% |
| 50 | Guardian Construction, Inc. | – | $23.9M | 0% |
| 51 | Olgoonik Oilfield Services, Llc | – | $23.2M | 0% |
| 52 | Bairco Construction Inc | – | $23.1M | 0% |
| 53 | Carahsoft Technology Corp | – | $23.0M | 0% |
| 54 | Cgi Federal Inc. | – | $22.8M | 0% |
| 55 | Deloitte Consulting Llp | – | $22.5M | 0% |
| 56 | Tehama Technical Services, Llc | – | $22.5M | 0% |
| 57 | Science Applications International Corporation | SAIC | $22.1M | 0% |
| 58 | Excella, Llc | – | $20.6M | 0% |
| 59 | Centerre Construction, Inc. | – | $19.2M | 0% |
| 60 | Affigent, Llc | – | $18.1M | 0% |
Spending by component
| Sub-agency | Obligations, 12 months |
|---|---|
| Departmental Offices | $2.56B |
| National Park Service | $1.69B |
| Bureau of Reclamation | $809.6M |
| Bureau of Land Management | $592.7M |
| U.S. Geological Survey | $439.0M |
| Bureau of Indian Affairs and Bureau of Indian Education | $391.8M |
| U.S. Fish and Wildlife Service | $278.2M |
| Bureau of Safety and Environmental Enforcement | $83.4M |
| Bureau of Ocean Energy Management | $19.4M |
| Office of Surface Mining, Reclamation and Enforcement | $6.5M |
Listed companies with Department of the Interior contracts (5 years)
| Company | Ticker | Obligations, 5 years | Sector |
|---|---|---|---|
| General Dynamics | GD | $802.7M | Industrials |
| Kbr | KBR | $290.6M | Industrials |
| Jacobs Solutions | J | $287.2M | Industrials |
| Booz Allen Hamilton Holding | BAH | $279.4M | Industrials |
| Perimeter Solutions | PRM | $277.1M | Materials |
| Tutor Perini | TPC | $252.7M | Consumer |
| CACI International | CACI | $110.0M | Technology |
| Science Applications International | SAIC | $108.0M | Technology |
| Verizon Communications | VZ | $54.2M | Communications |
| Textron | TXT | $53.4M | Industrials |
| Maximus | MMS | $48.4M | Consumer |
| Axon Enterprise | AXON | $45.5M | Industrials |
| Aecom | ACM | $44.4M | Industrials |
| Sysco | SYY | $44.0M | Consumer |
| Centene | CNC | $37.8M | Financials |
| Oshkosh | OSK | $33.1M | Consumer |
| Tetra Tech | TTEK | $31.4M | Industrials |
| Caterpillar | CAT | $30.7M | Industrials |
| GE Aerospace | GE | $29.9M | Technology |
| Ameresco | AMRC | $28.7M | Industrials |
| Northrop Grumman | NOC | $21.7M | Industrials |
| L3Harris Technologies | LHX | $19.3M | Industrials |
| Teledyne Technologies | TDY | $17.5M | Industrials |
| The Timken | TKR | $16.9M | Industrials |
| Lockheed Martin | LMT | $13.8M | Industrials |
| Telos | TLS | $11.8M | Technology |
| Motorola Solutions | MSI | $10.5M | Technology |
| Abbott Laboratories | ABT | $10.4M | Health |
| V2X | VVX | $10.0M | Industrials |
| UnitedHealth Group | UNH | $9.4M | Financials |
| Xerox Holdings | XRX | $6.8M | Technology |
| Jones Lang LaSalle | JLL | $6.3M | Real estate |
| US Foods Holding | USFD | $6.0M | Consumer |
| Danaher | DHR | $5.4M | Industrials |
| Thermo Fisher Scientific | TMO | $4.6M | Industrials |
| Republic Services | RSG | $4.2M | Utilities |
| Illumina | ILMN | $3.7M | Industrials |
| Huntington Ingalls Industries | HII | $2.8M | Industrials |
| FedEx | FDX | $2.6M | Industrials |
| Merck | MRK | $2.3M | Health |
| Agilent Technologies | A | $1.9M | Industrials |
| Parsons | PSN | $1.8M | Technology |
| Ametek | AME | $1.7M | Industrials |
| The Boeing | BA | $1.3M | Industrials |
| Black Hills | BKH | $1.1M | Utilities |
| Quest Diagnostics | DGX | $1.1M | Health |
| Olin | OLN | $1.0M | Materials |
| Hewlett Packard Enterprise | HPE | $844K | Technology |
| T-Mobile US | TMUS | $722K | Communications |
| Sap Se | SAP | $692K | Technology |
| TransDigm Group | TDG | $396K | Industrials |
| Herc Holdings | HRI | $378K | Consumer |
| Performance Food Group | PFGC | $252K | Consumer |
| Eaton | ETN | $220K | Industrials |
| Stryker | SYK | $220K | Health |
| Duke Energy | DUK | $193K | Utilities |
| Resideo Technologies | REZI | $151K | Consumer |
| Honeywell International | HON | $145K | Industrials |
| Fortive | FTV | $126K | Industrials |
| Henry Schein | HSIC | $109K | Consumer |
Contract data: USAspending.gov (federal prime contract obligations, award types A-D, by action date) and the Department of Defense daily contract announcements (awards of $7.5 million or more). Both are public-domain U.S. government data. Company matching uses legal names and parent/child recipient records and is deliberately conservative, so some subsidiaries may be missing. Obligations are not revenue. Not investment advice.
Frequently asked questions
Who are the biggest Department of the Interior contractors?
In the last 12 months: General Dynamics Information Technology, Inc. $239.5M; Nw Construction, Inc $138.8M; Guidehouse Inc. $136.1M; Ames Federal Contracting Group Llc $132.5M; Record Steel And Construction, Inc. $129.8M.
How much does the Department of the Interior spend on contracts?
$6.87B in prime contract obligations over the last 12 months, per USAspending.gov.