In 1938, Weidner was offered and accepted a teaching position at the Pennsylvania Academy of the Fine Arts. He left the WPA at this time and was not part of WPA when it was liquidated in 1943. His early successes in art exhibitions at the Carnegie International in Pittsburgh, Corcoran Biennial in Washington, D.C., and PAFA Annual Exhibitions in Philadelphia resulted in his inclusion in the 1939 New York World’s Fair representing Pennsylvania.