Department of Defense NAICS 541620 contractors

Environmental Consulting Services. Contractors in this NAICS lane under Department of Defense.

Agency: Department of Defense

Last updated: April 17, 2026

Visible recipients

Mapped obligations

$3,729,878,400

Visible recipients tied to Department of Defense and NAICS 541620

Cherokee Nation Technology Solutions LLC

Tulsa, OK

Tulsa, OK | 20 awards | Top agency Department of Defense | NAICS 541620

$125,002,891

Tetra Tech Ec, Inc.

San Diego, CA

San Diego, CA | 5 awards | Top agency Department of Defense | NAICS 562910

$24,808,110

Chenega Global Services LLC

San Antonio, TX

San Antonio, TX | 5 awards | Top agency Department of Defense | NAICS 562910

$14,579,455

Icf Incorporated, L.l.c.

Reston, VA

Reston, VA | 1,306 awards | Top agency Department of Health and Human Services | NAICS 541611

$387,719,464

Weston Solutions INC

West Chester, PA

West Chester, PA | 378 awards | Top agency Department of Defense | NAICS 236220

$531,028,453

Ahtna Facility Services, Incorporated

Anchorage, AK

Anchorage, AK | 20 awards | Top agency Department of Energy | NAICS 562910

$1,113,678

Olgoonik Diversified Services LLC

Colorado Springs, CO

Colorado Springs, CO | 20 awards | Top agency Department of Defense | NAICS 236220

$1,450,252

Tetra Tech, Inc.

Pasadena, CA

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

$982,433,526

Resource Management Concepts, Inc.

Lexington Park, MD

Lexington Park, MD | 153 awards | Top agency Department of Defense | NAICS 541330

$43,137,052

Src INC

Syracuse, NY

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

$274,130,666

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