Department of the Interior NAICS 541330 and PSC R499 contractors

Engineering Services. SUPPORT- PROFESSIONAL: OTHER. Cross-code overlap under Department of the Interior.

Department of the Interior · NAICS 541330 · PSC R499

Last updated: April 17, 2026

Visible recipients

Mapped obligations

$34,721,836,705

State overlap

Top recipients

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

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

Smartronix, LLC

Hollywood, MD

Hollywood, MD | 179 awards | Top agency General Services Administration | NAICS 541330

$2,505,129,594

Analytic Services Inc.

Arlington, VA

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

$810,645,078

The Mil Corporation

Bowie, MD

Bowie, MD | 189 awards | Top agency Department of Defense | NAICS 541519

$751,981,084

Hdr Environmental, Operations And Construction, Inc.

Englewood, CO

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

$594,758,035

Accelgov LLC

Bethesda, MD

Bethesda, MD | 89 awards | Top agency Department of Justice | NAICS 541614

$43,091,911

Chenega It Enterprise Services, LLC

Lorton, VA

Lorton, VA | 56 awards | Top agency Department of Defense | NAICS 541330

$127,363,242

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