Department of the Interior NAICS 236220 and PSC F108 contractors

Commercial and Institutional Building Construction. ENVIRONMENTAL SYSTEMS PROTECTION- ENVIRONMENTAL REMEDIATION. Cross-code overlap under Department of the Interior.

Department of the Interior · NAICS 236220 · PSC F108

Last updated: April 13, 2026

Visible recipients

Mapped obligations

$2,660,272,583

State overlap

Top recipients

Visible recipients in the Department of the Interior overlap of NAICS 236220 and PSC F108

Tetra Tech Ec, Inc.

San Diego, CA

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

$800,386,981

Aptim Federal Services, LLC

Baton Rouge, LA

Baton Rouge, LA | 303 awards | Top agency Department of Defense | NAICS 562910

$1,257,932,169

Sealaska Environmental Services, LLC

Juneau, AK

Juneau, AK | 20 awards | Top agency Department of Defense | NAICS 562910

$18,253,742

Relyant Global LLC

Maryville, TN

Maryville, TN | 66 awards | Top agency Department of Defense | NAICS 236220

$368,854,792

Ahtna Global LLC

Anchorage, AK

Anchorage, AK | 92 awards | Top agency Department of Defense | NAICS 562910

$184,455,906

Ahtna Solutions, LLC

Anchorage, AK

Anchorage, AK | 62 awards | Top agency Department of Defense | NAICS 562910

$30,388,993

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