Department of the Interior NAICS 541990 contractors

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

Agency: Department of the Interior

Last updated: April 20, 2026

Visible recipients

Mapped obligations

$4,768,362,663

Visible recipients tied to Department of the Interior and NAICS 541990

Mantech Srs Technologies, Inc.

Herndon, VA

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

$166,534,521

Calibre Systems INC

Alexandria, VA

Alexandria, VA | 125 awards | Top agency Department of Defense | NAICS 541990

$664,058,066

Analytic Services Inc.

Arlington, VA

Arlington, VA | 91 awards | Top agency Department of Defense | NAICS 541611

$175,253,288

Sealaska Environmental Services, LLC

Juneau, AK

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

$737,962

The Bizzell Group LLC

Hyattsville, MD

Hyattsville, MD | 126 awards | Top agency Department of Health and Human Services | NAICS 541611

$25,358,039

Tuvli LLC

Herndon, VA

Herndon, VA | 247 awards | Top agency Department of State | NAICS 541990

$206,081,138

Quinault Indian Nation

Taholah, WA

Taholah, WA | 122 awards | Top agency Department of the Interior | NAICS 221320

$127,526

Cherokee Nation System Solutions LLC

Tulsa, OK

Tulsa, OK | 511 awards | Top agency Department of State | NAICS 561210

$64,639,799

Sault Ste Marie Tribe Of Chippewa Indians

Sault Sainte Marie, MI

Sault Sainte Marie, MI | 126 awards | Top agency Department of Health and Human Services | NAICS 238330

$20,000

Muscogee Nation Business Enterprise

Okmulgee, OK

Okmulgee, OK | 20 awards | Top agency Department of Defense | NAICS 541519

$1,841,451

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