PSA-Dewberry has been selected to design an $86-million renovation and expansion of the student union at Oklahoma State University in Stillwater, Oklahoma. The existing union, comprised of 332,139 square feet, is one of the largest in the United States. Campus officials envision a possible increase to 365,312 square feet.

The Tulsa office of PSA-Dewberry has a long history of designing projects for the Stillwater campus, including the Center for Services to Students, the last major renovation/expansion of the union which was completed in 1999.