Federal agency contract profile
Department of the Interior: Federal Contract Spending & Top Vendors
Data through 2026-09-28 · FY2026 to date
- Obligations, FY2026 to date
- $6.8B
- Contract awards
- 25,180
- Average award size
- $270K
- vs. prior full fiscal year
- 3.5% growth
| Item | Obligations |
|---|---|
| FY21 | $5.1B |
| FY22 | $6.5B |
| FY23 | $7.6B |
| FY24 | $8.1B |
| FY25 | $6.6B |
| FY26 | $6.8B |
Obligations grew 3.5% year over year, from $6.6B in FY2025 to $6.8B in FY2026 to date.
The Department of the Interior obligated $6.8B in contracts in FY2026 to date. The Department recorded 25,180 awards with an average award size of $270K, and obligations were up 3.5% year over year. The Department's FY21 to FY26 obligations show a multi-year pattern: FY21 was $5.1B, FY22 was $6.5B, FY23 was $7.6B, FY24 was $8.1B, FY25 was $6.6B, and FY26 is $6.8B. Construction and IT services dominate the FY2026 to date spend by NAICS: Water and Sewer Line and Related Structures Construction accounted for $752M, Commercial and Institutional Building Construction accounted for $542M, and Other Computer Related Services accounted for $520M. The top vendors for FY2026 to date include GENERAL DYNAMICS INFORMATION TECHNOLOGY, INC. at $239M, GUIDEHOUSE INC. at $136M, and AMES FEDERAL CONTRACTING GROUP LLC at $132M. Contract obligations are concentrated in a mix of heavy civil construction, building trades, and information technology and consulting services.
What are the biggest spending categories for Interior this year?
Water and Sewer Line and Related Structures Construction is the largest category at $752M. Commercial and Institutional Building Construction follows at $542M, with Other Computer Related Services at $520M and Computer Systems Design Services at $516M. Other significant categories include Other Heavy and Civil Engineering Construction at $494M and Support Activities for Forestry at $288M.
| Item | Obligations |
|---|---|
| Water and Sewer Line and Related Structures Construction | $752M |
| Commercial and Institutional Building Construction | $542M |
| Other Computer Related Services | $520M |
| Computer Systems Design Services | $516M |
| Other Heavy and Civil Engineering Construction | $494M |
| Administrative Management and General Management Consulting Services | $312M |
| Custom Computer Programming Services | $294M |
| Support Activities for Forestry | $288M |
| Engineering Services | $193M |
| Highway, Street, and Bridge Construction | $192M |
Water and Sewer Line and Related Structures Construction was Interior's largest contract category, with $752M obligated (11.1% of contract spending).
Who captures the largest share of Interior contract dollars?
GENERAL DYNAMICS INFORMATION TECHNOLOGY, INC. is the top vendor at $239M. GUIDEHOUSE INC. is second at $136M and AMES FEDERAL CONTRACTING GROUP LLC is third at $132M. RECORD STEEL AND CONSTRUCTION, INC. and NW CONSTRUCTION, INC rank next at $130M and $127M respectively.
| Item | Obligations |
|---|---|
| GENERAL DYNAMICS INFORMATION TECHNOLOGY, INC. | $239M |
| GUIDEHOUSE INC. | $136M |
| AMES FEDERAL CONTRACTING GROUP LLC | $132M |
| RECORD STEEL AND CONSTRUCTION, INC. | $130M |
| NW CONSTRUCTION, INC | $127M |
| PERIMETER SOLUTIONS LP | $116M |
| G.S.E. CONSTRUCTION COMPANY, INC. | $109M |
| KIEWIT INFRASTRUCTURE WEST CO. | $104M |
| FLATLAND ENERGY SERVICES LLC | $75.5M |
| KBR WYLE SERVICES, LLC | $74.5M |
GENERAL DYNAMICS INFORMATION TECHNOLOGY, INC. led all Interior contractors with $239M, 3.5% of obligations.
| Rank | Vendor | Obligations |
|---|---|---|
| 1 | GENERAL DYNAMICS INFORMATION TECHNOLOGY, INC. | $239M |
| 2 | GUIDEHOUSE INC. | $136M |
| 3 | AMES FEDERAL CONTRACTING GROUP LLC | $132M |
| 4 | RECORD STEEL AND CONSTRUCTION, INC. | $130M |
| 5 | NW CONSTRUCTION, INC | $127M |
| 6 | PERIMETER SOLUTIONS LP | $116M |
| 7 | G.S.E. CONSTRUCTION COMPANY, INC. | $109M |
| 8 | KIEWIT INFRASTRUCTURE WEST CO. | $104M |
| 9 | FLATLAND ENERGY SERVICES LLC | $75.5M |
| 10 | KBR WYLE SERVICES, LLC | $74.5M |
| Rank | Recipient | Award Amount |
|---|---|---|
| 1 | ACACIA CENTER FOR JUSTICE | $832M |
| 2 | GUIDEHOUSE INC. | $450M |
| 3 | CDM CONSTRUCTORS INC | $364M |
| 4 | FAMILY ENDEAVORS, INC. | $347M |
| 5 | DEEP MILE NETWORKS LLC | $335M |
| 6 | JACOBS PROJECT MANAGEMENT CO. | $271M |
| 7 | THE PROVIDENCIA GROUP LLC | $270M |
| 8 | NW CONSTRUCTION, INC | $257M |
| 9 | LUMEN TECHNOLOGIES GOVERNMENT SOLUTIONS, INC. | $247M |
| 10 | BOOZ ALLEN HAMILTON INC | $245M |
| 11 | STRONGHOLD ENGINEERING INC | $226M |
| 12 | TEPA EC, LLC | $221M |
| 13 | KIEWIT INFRASTRUCTURE WEST CO. | $218M |
| 14 | PLANET TECHNOLOGIES, INC. | $202M |
| 15 | BWI TPC, A JOINT VENTURE | $188M |
| 16 | DLH, LLC | $180M |
| 17 | CGI FEDERAL INC. | $163M |
| 18 | DEPLOYED SERVICES, LLC | $157M |
| 19 | MAGELLAN FEDERAL, INC. | $154M |
| 20 | NW CONSTRUCTION, INC | $139M |
| 21 | GENERAL DYNAMICS INFORMATION TECHNOLOGY, INC. | $138M |
| 22 | OSCAR RENDA CONTRACTING INC | $134M |
| 23 | RECORD STEEL AND CONSTRUCTION, INC. | $129M |
| 24 | CENTERPOINT LLC | $126M |
| 25 | HENSEL PHELPS CONSTRUCTION CO | $118M |
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Frequently asked questions
How much does Department of the Interior spend on contracts?
The Department of the Interior obligated $6.8B in contracts in FY2026 to date. The Department executed 25,180 awards with an average award size of $270K, and obligations were up 3.5% year over year.
What does Interior buy?
Interior buys construction, engineering, forestry support, and information technology and consulting services. Top NAICS categories in FY2026 to date include Water and Sewer Line and Related Structures Construction at $752M, Commercial and Institutional Building Construction at $542M, and Other Computer Related Services at $520M.
Who are Interior's largest contractors?
GENERAL DYNAMICS INFORMATION TECHNOLOGY, INC. is Interior's largest contractor at $239M. Other leading contractors in FY2026 to date include GUIDEHOUSE INC. at $136M and AMES FEDERAL CONTRACTING GROUP LLC at $132M.
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