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NAICS 488111 and PSC Y1AA contractors in Illinois

Air Traffic Control. CONSTRUCTION OF OFFICE BUILDINGS. Use this deeper state cross-code page to see which visible contractors sit in the overlap between these two lanes inside Illinois.

Illinois · NAICS 488111 · PSC Y1AA

Last updated: April 7, 2026

Visible recipients

Mapped obligations

$198,895,733

Buyer overlap

Top recipients

Visible recipients in the Illinois overlap of NAICS 488111 and PSC Y1AA

Walsh Federal LLC

Chicago, IL

Walsh Federal LLC is a federal category business profile based in Chicago, IL. The current public data layer shows $406,413,501 in visible federal obligations across 169 awards or transactions. Department of Defense appears as the strongest visible awarding agency. Top industry concentration is in NAICS 236220 (Commercial and Institutional Building Construction). The profile also shows meaningful product and service activity in PSC Y1BZ.

$198,895,733