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Home/Illinois/Department of Defense/NAICS 541330/PSC R499

State + agency + NAICS + PSC page

Department of Defense NAICS 541330 and PSC R499 contractors in Illinois

Engineering Services. SUPPORT- PROFESSIONAL: OTHER. Deepest cross-filter overlap.

Illinois · Department of Defense

Last updated: April 8, 2026

Visible recipients

2

Mapped obligations

$10,481,030,268

Cross-code depth

4 filters

Top recipients

Visible recipients tied to Department of Defense, Illinois, NAICS 541330, and PSC R499

Alion Science And Technology Corporation

Chicago, IL

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

Hii Mission Technologies CORP

Willowbrook, IL

Willowbrook, IL | 464 awards | Top agency Department of Defense | NAICS 541330

$10,171,487,561

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Top recipient paths -- ranked view
Department of Defense NAICS 541330 -- drop PSC filter
Department of Defense PSC R499 -- drop NAICS filter