Department of Homeland Security NAICS 541330 contractors

Engineering Services. Contractors in this NAICS lane under Department of Homeland Security.

Agency: Department of Homeland Security

Last updated: April 19, 2026

Visible recipients

163

Mapped obligations

$236,564,446,561

Visible recipients tied to Department of Homeland Security and NAICS 541330

Leidos, Inc.

Reston, VA

Reston, VA | 9,621 awards | Top agency Department of Defense | NAICS 541512

$16,908,888,817

Loyal Source Government Services LLC

Orlando, FL

Orlando, FL | 96 awards | Top agency Department of Veterans Affairs | NAICS 621111

$36,264,045

Battelle Memorial Institute

Richland, WA

Richland, WA | 103 awards | Top agency Department of Energy | NAICS 541710

$971,040,247

Bae Systems Land & Armaments L.p.

York, PA

York, PA | 240 awards | Top agency Department of Defense | NAICS 336992

$2,323,059,562

Vectrus Systems LLC

Colorado Springs, CO

Colorado Springs, CO | 1,224 awards | Top agency Department of Defense | NAICS 561210

$1,113,822,030

Vertex Aerospace LLC

Madison, MS

Madison, MS | 623 awards | Top agency Department of Defense | NAICS 488190

$710,882,876

Alion Science And Technology Corporation

Chicago, IL

Chicago, IL | 5 awards | Top agency Department of Defense | NAICS 541710

$100,025,236

Bae Systems Technology Solutions & Services Inc.

Rockville, MD

Rockville, MD | 1,291 awards | Top agency Department of Defense | NAICS 541330

$12,003,356,992

Mantech Systems Engineering Corporation

Fairfax, VA

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

$1,121,327,149

Ball Aerospace & Technologies Corp.

Boulder, CO

Boulder, CO | 5 awards | Top agency Department of Defense | NAICS 541330

$483,301,525

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