Department of Homeland Security NAICS 541330 and PSC R499 contractors

Engineering Services. SUPPORT- PROFESSIONAL: OTHER. Cross-code overlap under Department of Homeland Security.

Department of Homeland Security · NAICS 541330 · PSC R499

Last updated: April 17, 2026

Visible recipients

Mapped obligations

$216,520,175,099

State overlap

Top recipients

Visible recipients in the Department of Homeland Security overlap of NAICS 541330 and PSC R499

Guidehouse Digital LLC

Mc Lean, VA

Mc Lean, VA | 389 awards | Top agency Department of Homeland Security | NAICS 541512

$244,897,415

Src INC

Syracuse, NY

Syracuse, NY | 271 awards | Top agency Department of Defense | NAICS 334511

$910,100,260

Credence Dynamo Solutions LLC

Vienna, VA

Vienna, VA | 102 awards | Top agency Department of Defense | NAICS 541330

$476,813,081

Nv5 Geospatial, Inc.

Saint Petersburg, FL

Saint Petersburg, FL | 132 awards | Top agency Department of the Interior | NAICS 541360

$45,570,087

Tatitlek Technologies, LLC

Anchorage, AK

Anchorage, AK | 238 awards | Top agency Department of State | NAICS 561210

$461,929,674

Tatitlek Federal Services LLC

Anchorage, AK

Anchorage, AK | 230 awards | Top agency Department of State | NAICS 541611

$365,157,346

Akima Systems Engineering LLC

Herndon, VA

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

$106,069,328

Wsp USA Environment & Infrastructure Inc.

Blue Bell, PA

Blue Bell, PA | 309 awards | Top agency Department of Defense | NAICS 236220

$390,609,023

Mantech Srs Technologies, Inc.

Herndon, VA

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

$609,025,000

Ensco INC

Vienna, VA

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

$438,051,185

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