Department of Transportation NAICS 541990 contractors

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

Agency: Department of Transportation

Last updated: April 19, 2026

Visible recipients

Mapped obligations

$11,766,465,937

Visible recipients tied to Department of Transportation and NAICS 541990

The Mitre Corporation

Mc Lean, VA

Mc Lean, VA | 880 awards | Top agency Department of Defense | NAICS 541990

$9,981,400,087

Walsh Federal LLC

Chicago, IL

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

$622,102

Westat, Inc.

Bethesda, MD

Bethesda, MD | 469 awards | Top agency Department of Health and Human Services | NAICS 541720

$814,483,185

Applied Research Associates, Inc.

Albuquerque, NM

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

$234,311,642

Noblis, Inc.

Reston, VA

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

$237,683,736

Aecom Energy & Construction, Inc.

Greenwood Village, CO

Greenwood Village, CO | 5 awards | Top agency Department of Defense | NAICS 237990

$7,661,197

Serco Management Services, Inc.

Reston, VA

Reston, VA | 5 awards | Top agency Department of Transportation | NAICS 488111

$668,528

Axient LLC

Arlington, VA

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

$11,452,870

Sparksoft Corporation

Columbia, MD

Columbia, MD | 52 awards | Top agency Department of Health and Human Services | NAICS 541512

$9,527,032

Macaulay-brown, Inc.

Dayton, OH

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

$968,051

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