Department of the Interior PSC R425 contractors

SUPPORT- PROFESSIONAL: ENGINEERING/TECHNICAL. Contractors in this PSC lane under Department of the Interior.

Agency: Department of the Interior

Last updated: April 19, 2026

Visible recipients

Mapped obligations

$37,456,056,091

Visible recipients tied to Department of the Interior and PSC R425

Freese And Nichols, Inc.

Fort Worth, TX

Fort Worth, TX | 5 awards | Top agency Department of Transportation | NAICS 541330

Icf Incorporated

Fairfax, VA

Fairfax, VA | 5 awards | Top agency Department of Health and Human Services | NAICS 541611

$221,096,763

Zantech It Services, Inc.

Reston, VA

Reston, VA | 51 awards | Top agency Department of Homeland Security | NAICS 541611

$56,446,645

Southland Industries

Sterling, VA

Sterling, VA | 15 awards | Top agency Department of Defense | NAICS 541330

$48,720,978

Btas INC

Beavercreek, OH

Beavercreek, OH | 50 awards | Top agency Department of Defense | NAICS 541712

$67,318,110

Geomatics Data Solutions, A Woolpert Company, LLC

Hillsboro, OR

Hillsboro, OR | 5 awards | Top agency Department of the Interior | NAICS 541370

$758,882

Ulteig Engineers INC

Fargo, ND

Fargo, ND | 5 awards | Top agency Department of Agriculture | NAICS 541370

$358,520

Ares Corporation

Mclean, VA

Mclean, VA | 16 awards | Top agency National Aeronautics and Space Administration | NAICS 541712

$190,482,381

Ameresco Federal Solutions, Inc.

Farmingham, MA

Farmingham, MA | 18 awards | Top agency Department of Homeland Security | NAICS 541330

$9,326,438

Integral Consulting Inc.

Boulder, CO

Boulder, CO | 9 awards | Top agency Department of Energy | NAICS 541620

$78,655

Page 6 of 7Prev 1 2 3 4 5 6 7 Next

Agency profile

Loading buyer-level contractor and category paths