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NAICS 541715 and PSC R499 contractors

Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology). SUPPORT- PROFESSIONAL: OTHER. Cross-code contractor overlap.

NAICS 541715 + PSC R499

Last updated: April 17, 2026

Visible recipients

Mapped obligations

$38,062,367,933

State overlap

Top recipients

Visible recipients in the NAICS 541715 and PSC R499 overlap

Mantech Srs Technologies, Inc.

Herndon, VA

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

$392,179,999

Ensco INC

Vienna, VA

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

$296,661,841

The Emmes Company, LLC

Rockville, MD

Rockville, MD | 69 awards | Top agency Department of Health and Human Services | NAICS 541712

$285,018,308

Rsi-quantitech Jv LLC

Huntsville, AL

Huntsville, AL | 33 awards | Top agency National Aeronautics and Space Administration | NAICS 541715

$214,581,424

Navarro Research And Engineering, Inc.

Oak Ridge, TN

Oak Ridge, TN | 102 awards | Top agency Department of Energy | NAICS 562910

$119,063,969

The Mil Corporation

Bowie, MD

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

$147,144,516

Goldbelt Professional Services, LLC

Chesapeake, VA

Chesapeake, VA | 75 awards | Top agency Department of Health and Human Services | NAICS 541611

$90,714,668

Chenega Enterprise Systems & Solutions, LLC

Chesapeake, VA

Chesapeake, VA | 180 awards | Top agency Department of Health and Human Services | NAICS 541611

$262,637,172

Sehlke Consulting LLC

Vienna, VA

Vienna, VA | 79 awards | Top agency General Services Administration | NAICS 541511

$187,683,390

Sentar, Inc.

Huntsville, AL

Huntsville, AL | 67 awards | Top agency Department of Defense | NAICS 541330

$38,665,775

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