PSI is a single source provider of high quality packaging equipment and materials for a wide variety of packaging application ... s in all types of industries. PSI has grown through the years to its current position of being a dominant force in the corrugated marketplace for the Mid-Atlantic region. PSI credits its growth to product innovation, exceptional customer service, product quality, state-of-the-art equipment, involved employees and on-time delivery. PSI Group - Packaging Services Industries consists of three corporations: Packaging Services of Maryland, Inc., formed in 1976 is located in Williamsport, MD. This location serves as the corporate headquarters for PSI Group. PSI Packaging Services, Inc., formed in 1982, located in Connellsville, PA. PSI Container Inc., formed in 1995, is a located in McAdoo, PA. read more