PSI was founded in 1983 by Jack Bertelsmeyer and Curt Hertel. Since then, it has grown to over 30 employees and 3 Locations. PSI has always been and will always be a full service compressor distributor. Over the years, PSI has become the midwest leader in providing Efficient and Reliable Compressed Air Systems and Service. Three locations in Missouri and Illinois allows timely service and parts deliveries. PSI has strong relationships with customers as diverse as Anheuser Busch, Boeing, Daimler Chrysler, Rubbermaid, Ford, and 3M to name a few.