General Services Administration NAICS 541990 and PSC R425 contractors in Illinois

All Other Professional, Scientific, and Technical Services. SUPPORT- PROFESSIONAL: ENGINEERING/TECHNICAL. Use this deepest state-buyer cross-code page to see which visible contractors sit in the exact overlap of buyer, geography, industry, and product-service lane.

Illinois · General Services Administration

Last updated: April 8, 2026

Visible recipients

Mapped obligations

$4,562,455,503

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Top recipients

Visible recipients tied to General Services Administration, Illinois, NAICS 541990, and PSC R425

Hii Mission Technologies CORP

Willowbrook, IL

Hii Mission Technologies CORP is a federal category business profile based in Willowbrook, IL. The current public data layer shows $380,690,397 in visible federal obligations across 464 awards or transactions. Department of Defense appears as the strongest visible awarding agency. Top industry concentration is in NAICS 541330 (Engineering Services). The profile also shows meaningful product and service activity in PSC AZ12.

$4,562,455,503