In 1928 he participated with the Austrian National Team in the Olympic tournament, appearing in two games. Eight years later he was again a member of the Austrian team at the 1936 Olympic tournament. He played all six matches as goaltender. He also played for Austria at the 1926 European Championship and was in net for 14 games at the World Championships between 1930 and 1935. Weiss spent the vast majority of his club career with Wiener EV in the Austrian Hockey Championship. His final season of club play, 1938-39, was spent with the Swiss club, EHC St. Moritz.