Oakbrook Terrace, Ill. — Professional Service Industries, Inc. (PSI), an independent engineering and testing firm with approximately $260 million in annual revenues, acquired Midwest Engineering Services, Inc. (MES). MES is a full-service engineering testing, inspection and consulting firm with five locations in Wisconsin.

Founded in 1989, MES adds 40 staff and about $4 million in revenue to PSI’s family of companies. MES is headquartered in Waukesha, Wis., with offices in Appleton, Chippewa Falls, Green Bay, and Ripon. Combined with PSI’s existing operation in Pewaukee, Wis., this now creates the largest engineering, testing and inspection firm of its type in the state. MES will continue operations as MES – A PSI Company. This acquisition has closed and is effective March 31, 2014.

Dave Barndt has been promoted to senior vice president with responsibilities overseeing offices in Illinois, Wisconsin and Minnesota. Joining the PSI leadership team in Wisconsin from MES will be Matt Henderson and Jim Becco. As vice president, Henderson will oversee all operations in Wisconsin and as district manager, Becco will oversee operations in the greater Milwaukee area.

Murray Savage, CEO of PSI commented, “I am very pleased that MES management and staff will continue to be part of the leadership team in Wisconsin. In fact, the combination of our two firms and our joint commitment to safety, quality and ethics fits perfectly into PSI’s Information To Build On business model and One Company, One Call service delivery platform.”

PSI provides a wide range of environmental, engineering and testing services, including: environmental consulting, geotechnical engineering, construction materials testing and engineering, industrial hygiene services, facilities and roof consulting, NDE, and specialty engineering and testing services.