Department of the Interior NAICS 541330 contractors

Engineering Services. Contractors in this NAICS lane under Department of the Interior.

Agency: Department of the Interior

Last updated: April 19, 2026

Visible recipients

114

Mapped obligations

$39,781,929,483

Visible recipients tied to Department of the Interior and NAICS 541330

Chenega Federal Systems, LLC

Bethesda, MD

Bethesda, MD | 20 awards | Top agency Department of Defense | NAICS 541330

$219,174,372

Caci Intelligence Solutions, LLC

Herndon, VA

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

$105,425,422

Alutiiq 3sg, LLC

Anchorage, AK

Anchorage, AK | 20 awards | Top agency Department of Defense | NAICS 541330

$123,849,633

Tatitlek Training Services, Inc.

Anchorage, AK

Anchorage, AK | 20 awards | Top agency Department of Defense | NAICS 561210

$130,130,224

Modern Technology Solutions, Inc.

Alexandria, VA

Alexandria, VA | 285 awards | Top agency General Services Administration | NAICS 541712

$216,557,643

Tetra Tech Ec, Inc.

San Diego, CA

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

$83,865,987

Odyssey Systems Consulting Group, Ltd.

Wakefield, MA

Wakefield, MA | 257 awards | Top agency Department of Defense | NAICS 541712

$29,961,699

Magellan Federal, Inc.

Arlington, VA

Arlington, VA | 118 awards | Top agency Department of Defense | NAICS 624190

$96,813,117

Applied Research Associates, Inc.

Albuquerque, NM

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

$818,811,767

Systems Planning And Analysis, Inc.

Alexandria, VA

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

$1,387,600,926

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