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

Wsp USA Solutions INC

Arlington, VA

Arlington, VA | 228 awards | Top agency Department of Defense | NAICS 541330

$130,524,598

Nez Perce Tribe

Lapwai, ID

Lapwai, ID | 187 awards | Top agency Department of Health and Human Services | NAICS 541990

$800,901

Leidos Security Detection & Automation, Inc.

Tewksbury, MA

Tewksbury, MA | 56 awards | Top agency Department of Homeland Security | NAICS 334517

$336,047,909

Seminole Tribe Of Florida

Hollywood, FL

Hollywood, FL | 131 awards | Top agency Department of the Treasury | NAICS 311611

$196,430

Black & Veatch Corporation

Alpharetta, GA

Alpharetta, GA | 5 awards | Top agency Environmental Protection Agency | NAICS 541611

$143,247

Sumaria Systems, LLC

Beavercreek, OH

Beavercreek, OH | 104 awards | Top agency Department of Defense | NAICS 541712

$30,932,628

Kleinfelder INC

Rancho Cordova, CA

Rancho Cordova, CA | 5 awards | Top agency Department of Defense | NAICS 541330

$23,847,278

Moffatt & Nichol

Long Beach, CA

Long Beach, CA | 5 awards | Top agency Department of Defense | NAICS 541330

$247,094,405

Mantech Gray Hawk Systems, Inc.

Falls Church, VA

Falls Church, VA | 5 awards | Top agency Department of Defense | NAICS 541330

$15,885,465

Inalab Consulting, Inc.

Fairfax, VA

Fairfax, VA | 136 awards | Top agency Department of Defense | NAICS 541330

$42,640,847

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