NAICS 541990 contractors in Illinois

All Other Professional, Scientific, and Technical Services. Use this state-scoped industry page to see which visible federal contractors carry the clearest footprint in this NAICS lane inside Illinois.

State: Illinois

Last updated: April 3, 2026

Visible recipients

Mapped obligations

$28,645,341

Buyer overlap

Top recipients

Visible recipients tied to NAICS 541990 in Illinois

Aar Government Services, Inc.

Wood Dale, IL

Aar Government Services, Inc. is a federal category business profile based in Wood Dale, IL. The current public data layer shows $254,953,145 in visible federal obligations across 429 awards or transactions. Department of Defense appears as the strongest visible awarding agency. Top industry concentration is in NAICS 488190 (Other Support Activities for Air Transportation). The profile also shows meaningful product and service activity in PSC J015.

$28,645,341