Department of the Interior NAICS 541330 and PSC R425 contractors

Engineering Services. SUPPORT- PROFESSIONAL: ENGINEERING/TECHNICAL. Cross-code overlap under Department of the Interior.

Department of the Interior · NAICS 541330 · PSC R425

Last updated: April 19, 2026

Visible recipients

Mapped obligations

$64,258,245,344

State overlap

Top recipients

Visible recipients in the Department of the Interior overlap of NAICS 541330 and PSC R425

Mead & Hunt INC

Middleton, WI

Middleton, WI | 13 awards | Top agency Department of Defense | NAICS 541310

Parsons Corporation

Chantilly, VA

Chantilly, VA | 5 awards | Top agency General Services Administration | NAICS 561210

Booz Allen Hamilton Engineering Services, LLC

Annapolis Junction, MD

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

Northrop Grumman Technical Services, Inc.

Mclean, VA

Mclean, VA | 26 awards | Top agency Department of Defense | NAICS 488190

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