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2 companies

Professional Service Industries Inc.

Lombard, IL, United StatesUpdated Nov 1998

Professional Service Industries (PSI) is a national provider of testing, inspection, engineering, and consulting services across construction materials, environmental, geotechnical, and industrial sectors, with capabilities extending to marine surveying and cargo inspection.

Soil Consultants Inc.

Charleston, SC, United StatesUpdated May 2026

Soil Consultants, Inc. is a women-owned, full-service geotechnical engineering and construction materials testing firm based in Charleston, South Carolina, serving clients since 1951.