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NAICS 541330 and PSC R499 contractors

Engineering Services. SUPPORT- PROFESSIONAL: OTHER. Cross-code contractor overlap.

NAICS 541330 + PSC R499

Last updated: April 17, 2026

Visible recipients

170

Mapped obligations

$297,641,320,638

State overlap

Top recipients

Visible recipients in the NAICS 541330 and PSC R499 overlap

American Systems Corporation

Mclean, VA

Mclean, VA | 295 awards | Top agency Department of Defense | NAICS 541330

$1,060,412,692

Securigence LLC

Leesburg, VA

Leesburg, VA | 71 awards | Top agency Department of Defense | NAICS 541511

$5,001

Sev1tech, LLC

Woodbridge, VA

Woodbridge, VA | 225 awards | Top agency Department of Defense | NAICS 541712

$420,503,011

Tetra Tech, Inc.

Pasadena, CA

Pasadena, CA | 260 awards | Top agency Department of Defense | NAICS 541330

$2,643,250,195

Guidehouse Digital LLC

Mc Lean, VA

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

$244,897,415

Constellation Newenergy, Inc.

Baltimore, MD

Baltimore, MD | 265 awards | Top agency General Services Administration | NAICS 541330

$417,626,503

Siemens Government Technologies INC

Arlington, VA

Arlington, VA | 227 awards | Top agency Department of Defense | NAICS 541512

$818,225,900

Src INC

Syracuse, NY

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

$910,100,260

Maveris LLC

Mclean, VA

Mclean, VA | 26 awards | Top agency Department of Veterans Affairs | NAICS 541511

$163,139,358

Credence Dynamo Solutions LLC

Vienna, VA

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

$476,813,081

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