He played junior hockey for the Saskatoon Quakers in 1942-43. The next season he turned pro with the Hershey Bears and then the next season made the Blackhawks. Harms scored 5 goals and 5 assists in 43 games with Chicago (plus one scoreless game in 1943-44). Harms played for the Kansas City team in the United States Hockey League from 1945 to 1950, winning the league championship in 1946 and 1947. He then split the 1950-51 season between the senior Regina Capitals and Nelson Maple Leafs.