Professional Service Industries, Inc. (PSI) has a long and successful business history, second to none in our industry. Originally founded in 1961 in Champaign, Illinois as A&H Materials Testing Corporation, the company has grown significantly via organic growth and the acquisition of firms performing similar services. In 1972, the company incorporated and changed its name to Professional Service Industries, Inc. (PSI) and moved its corporate headquarters to the suburbs of Chicago in 1973.

Starting in the mid-1970’s, PSI began the process of acquisition growth and to date has acquired more than 90 firms offering similar or compatible services all across the United States. PSI’s acquisition strategy has focused on geographic expansion and service line strengthening and extension. Some of PSI’s more significant acquisitions include: Pittsburgh Testing Laboratory – a national leader in materials testing and inspection services with 40 plus office locations founded in 1881, and giving PSI a business history dating back more than 130 years; Jammal & Associates – a leader in environmental consulting, geotechnical engineering and materials testing in the Southeast; Hall-Kimbrell – a national player in the asbestos, industrial hygiene and environmental consulting fields with 25 office locations; American Engineering Laboratories – a leading firm in construction testing and geotechnical services with strong presence on both coasts; and Hi-Tech Testing – a full service non-destructive testing, inspection and consulting firm with 11 office locations.

Today, PSI is a well-respected and industry leading firm and is consistently ranked as one of the largest firms of its type by Engineering News Record (ENR). Employing ~2300 staff with ~100 office locations, PSI is a true, national firm delivering services locally to our valued clients. PSI has always been and will continue to be a disciplined and successful business entity. We are proud of our heritage and our future is bright. Sell One Company, One Call and deliver quality Information to Build On safely and ethically to delight our clients and grow profitably.