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

Walsh Federal LLC

Chicago, IL

Chicago, IL | 169 awards | Top agency Department of Defense | NAICS 236220

$622,102

Amentum National Security Programs, INC

Chantilly, VA

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

$205,207,342

Applied Research Associates, Inc.

Albuquerque, NM

Albuquerque, NM | 564 awards | Top agency Department of Defense | NAICS 541712

$234,311,642

Systems Planning And Analysis, Inc.

Alexandria, VA

Alexandria, VA | 238 awards | Top agency Department of Defense | NAICS 541330

$289,742,292

Noblis, Inc.

Reston, VA

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

$237,683,736

Credence Management Solutions Limited Liability Company

Mclean, VA

Mclean, VA | 222 awards | Top agency Department of Defense | NAICS 541330

$84,831,176

Govcio, LLC

Fairfax, VA

Fairfax, VA | 94 awards | Top agency Department of Veterans Affairs | NAICS 541512

$79,266

Peraton Risk Decision Inc.

Loveland, CO

Loveland, CO | 54 awards | Top agency Office of Personnel Management | NAICS 561611

$13,322,159

Guidehouse LLP

Mc Lean, VA

Mc Lean, VA | 134 awards | Top agency Department of State | NAICS 541611

$441,292,503

Asrc Federal Field Services, LLC

Beltsville, MD

Beltsville, MD | 207 awards | Top agency Department of Homeland Security | NAICS 561210

$8,392,024

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