Department of Homeland Security NAICS 541330 contractors in Illinois

Engineering Services. Use this deeper state-buyer-industry page to see which visible contractors sit closest to this exact overlap in the public AwardRegistry layer.

Illinois + Department of Homeland Security

Last updated: April 8, 2026

Visible recipients

Mapped obligations

$100,025,236

Visible recipients tied to Department of Homeland Security, Illinois, and NAICS 541330

Alion Science And Technology Corporation

Chicago, IL

Alion Science And Technology Corporation is a federal category business profile based in Chicago, IL. The current public data layer shows $1,391,195,185 in visible federal obligations across 5 awards or transactions. Department of Defense appears as the strongest visible awarding agency. Top industry concentration is in NAICS 541710 (Research and Development in the Physical, Engineering, and Life Sciences). The profile also shows meaningful product and service activity in PSC AZ12.

$100,025,236