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NAICS 541330 and PSC R499 contractors in Illinois

Engineering Services. SUPPORT- PROFESSIONAL: OTHER. Use this deeper state cross-code page to see which visible contractors sit in the overlap between these two lanes inside Illinois.

Illinois · NAICS 541330 · PSC R499
Last updated: April 8, 2026

Visible recipients

2

Mapped obligations

$10,481,030,268

Buyer overlap

4

Top recipients

Visible recipients in the Illinois overlap of NAICS 541330 and PSC R499