In September 1965, St. Joseph High School moved to 700 Stevenson Road North, and was renamed Oshawa Catholic High School. In 1976, the school was again renamed to Monsignor Paul Dwyer Catholic High School in memory of Monsignor Paul Dwyer, who gave generously to the Oshawa community and the development of Catholic education in Oshawa. Monsignor Dwyer was close friends with Pope Paul XXIII, who gifted him his pair of red slippers, which are currently on display in the main office.