Department of Defense NAICS 541690 and PSC R499 contractors

Other Scientific and Technical Consulting Services. SUPPORT- PROFESSIONAL: OTHER. Cross-code overlap under Department of Defense.

Department of Defense · NAICS 541690 · PSC R499

Last updated: April 17, 2026

Visible recipients

Mapped obligations

$3,943,085,248

State overlap

Top recipients

Visible recipients in the Department of Defense overlap of NAICS 541690 and PSC R499

Chenega Federal Systems, LLC

Bethesda, MD

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

$109,073,785

Caci Intelligence Solutions, LLC

Herndon, VA

Herndon, VA | 5 awards | Top agency Department of Defense | NAICS 541990

$206,240,181

Mantech Mission, Cyber And Technology Solutions, Inc.

Fairfax, VA

Fairfax, VA | 5 awards | Top agency Department of Defense | NAICS 541690

$259,952,263

Noblis, Inc.

Reston, VA

Reston, VA | 372 awards | Top agency Department of Transportation | NAICS 541330

$501,173,646

Icf Consulting Group, Inc.

Reston, VA

Reston, VA | 5 awards | Top agency Office of Personnel Management | NAICS 611430

$14,134,953

Tatitlek Technologies, LLC

Anchorage, AK

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

$256,567,506

Janus Research Group, LLC

Evans, GA

Evans, GA | 103 awards | Top agency General Services Administration | NAICS 611430

$176,511,341

Akima Systems Engineering LLC

Herndon, VA

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

$40,347,084

Noresco, LLC

Westborough, MA

Westborough, MA | 81 awards | Top agency Department of Defense | NAICS 541330

$377,723,790

Hdr Environmental, Operations And Construction, Inc.

Englewood, CO

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

$335,578,574

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