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General Services Administration NAICS 541990 and PSC Y1BA contractors in Illinois

All Other Professional, Scientific, and Technical Services. CONSTRUCTION OF AIR TRAFFIC CONTROL TOWERS. Use this deepest state-buyer cross-code page to see which visible contractors sit in the exact overlap of buyer, geography, industry, and product-service lane.

Illinois · General Services Administration
Last updated: April 7, 2026

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$243,209,271

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Visible recipients tied to General Services Administration, Illinois, NAICS 541990, and PSC Y1BA