Department of Homeland Security NAICS 541990 and PSC R499 contractors

All Other Professional, Scientific, and Technical Services. SUPPORT- PROFESSIONAL: OTHER. Cross-code overlap under Department of Homeland Security.

Department of Homeland Security · NAICS 541990 · PSC R499

Last updated: April 17, 2026

Visible recipients

Mapped obligations

$16,624,909,430

State overlap

Top recipients

Visible recipients in the Department of Homeland Security overlap of NAICS 541990 and PSC R499

Govcio, LLC

Fairfax, VA

Fairfax, VA | 94 awards | Top agency Department of Veterans Affairs | NAICS 541512

$358,338,455

Peraton Risk Decision Inc.

Loveland, CO

Loveland, CO | 54 awards | Top agency Office of Personnel Management | NAICS 561611

$320,163,986

Guidehouse LLP

Mc Lean, VA

Mc Lean, VA | 134 awards | Top agency Department of State | NAICS 541611

$1,435,589,451

Reli Group INC

Windsor Mill, MD

Windsor Mill, MD | 119 awards | Top agency Department of Health and Human Services | NAICS 541611

$185,329,799

Akima Systems Engineering LLC

Herndon, VA

Herndon, VA | 233 awards | Top agency Department of Defense | NAICS 541512

$38,776,656

Mantech Srs Technologies, Inc.

Herndon, VA

Herndon, VA | 76 awards | Top agency Department of Defense | NAICS 541330

$304,562,673

Catapult Consultants LLC

Fredericksburg, VA

Fredericksburg, VA | 5 awards | Top agency Department of Defense | NAICS 541611

$21,328,808

Akima Global Logistics, LLC

Herndon, VA

Herndon, VA | 118 awards | Top agency Department of Defense | NAICS 561210

$24,242,498

Ensco INC

Vienna, VA

Vienna, VA | 124 awards | Top agency Department of Defense | NAICS 541712

$347,523,104

Analytic Services Inc.

Arlington, VA

Arlington, VA | 91 awards | Top agency Department of Defense | NAICS 541611

$848,596,841

Page 2 of 5Prev 1 2 3 4 5 Next

Agency profile

Loading buyer-level contractor and category paths