State + agency + NAICS page

Department of Defense NAICS 541712 contractors in Illinois

Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology). 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 Defense
Last updated: April 8, 2026

Visible recipients

3

Mapped obligations

$4,300,051,578

Top PSC links

4

Top recipients

Visible recipients tied to Department of Defense, Illinois, and NAICS 541712

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.

$371,313,553

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.

$3,928,011,530

Illinois Applied Research Associates LLC

Glen Ellyn, IL

Illinois Applied Research Associates LLC is a federal category business profile based in Glen Ellyn, IL. The current public data layer shows $726,495 in visible federal obligations across 3 awards or transactions. Department of Defense appears as the strongest visible awarding agency. Top industry concentration is in NAICS 541712 (Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)). The profile also shows meaningful product and service activity in PSC AC22.

$726,495