Department of Homeland Security NAICS 541710 and PSC R499 contractors

Research and Development in the Physical, Engineering, and Life Sciences. SUPPORT- PROFESSIONAL: OTHER. Cross-code overlap under Department of Homeland Security.

Department of Homeland Security · NAICS 541710 · PSC R499

Last updated: April 17, 2026

Visible recipients

Mapped obligations

$23,656,795,009

State overlap

Top recipients

Visible recipients in the Department of Homeland Security overlap of NAICS 541710 and PSC R499

Battelle Memorial Institute

Richland, WA

Richland, WA | 103 awards | Top agency Department of Energy | NAICS 541710

$21,206,226,336

Alion Science And Technology Corporation

Chicago, IL

Chicago, IL | 5 awards | Top agency Department of Defense | NAICS 541710

$919,879,409

Chenega Federal Systems, LLC

Bethesda, MD

Bethesda, MD | 20 awards | Top agency Department of Defense | NAICS 541330

$111,467,894

Amentum Technical Services LLC

Aiken, SC

Aiken, SC | 6 awards | Top agency Department of Transportation | NAICS 541330

$103,649,203

Hdr Environmental, Operations And Construction, Inc.

Englewood, CO

Englewood, CO | 109 awards | Top agency Department of Defense | NAICS 541330

$157,749,557

The Cadmus Group LLC

Arlington, VA

Arlington, VA | 289 awards | Top agency Environmental Protection Agency | NAICS 541620

$228,542,387

Bevilacqua Research Corporation

Huntsville, AL

Huntsville, AL | 41 awards | Top agency Department of Defense | NAICS 541330

$15,969,541

Booz Allen Hamilton Engineering Services, LLC

Annapolis Junction, MD

Annapolis Junction, MD | 11 awards | Top agency Department of Defense | NAICS 541330

$913,310,682

Agency profile

Loading buyer-level contractor and category paths