Department of Homeland Security NAICS 541990 contractors

All Other Professional, Scientific, and Technical Services. Contractors in this NAICS lane under Department of Homeland Security.

Agency: Department of Homeland Security

Last updated: April 19, 2026

Visible recipients

Mapped obligations

$14,717,186,329

Visible recipients tied to Department of Homeland Security and NAICS 541990

Axient LLC

Arlington, VA

Arlington, VA | 83 awards | Top agency Department of Defense | NAICS 541330

$11,452,870

Macaulay-brown, Inc.

Dayton, OH

Dayton, OH | 5 awards | Top agency General Services Administration | NAICS 541511

$968,051

Semanticbits LLC

Reston, VA

Reston, VA | 54 awards | Top agency Department of Health and Human Services | NAICS 541519

$15,000

Reli Group INC

Windsor Mill, MD

Windsor Mill, MD | 119 awards | Top agency Department of Health and Human Services | NAICS 541611

$53,231,942

Akima Systems Engineering LLC

Herndon, VA

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

$16,932,042

Mantech Srs Technologies, Inc.

Herndon, VA

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

$166,534,521

Catapult Consultants LLC

Fredericksburg, VA

Fredericksburg, VA | 5 awards | Top agency Department of Defense | NAICS 541611

$13,711,784

Akima Global Logistics, LLC

Herndon, VA

Herndon, VA | 118 awards | Top agency Department of Defense | NAICS 561210

$12,118,749

Everfox LLC

Herndon, VA

Herndon, VA | 89 awards | Top agency Department of Defense | NAICS 611420

$43,838,533

Ensco INC

Vienna, VA

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

$171,128,594

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