Hamilton won ten professional titles, including one major, the PGA Championship in 1944 at Manito Golf and Country Club in Spokane, Washington.

He won five times on the PGA Tour, including the 1948 New Orleans Open, one stroke ahead of runner-up Roberto De Vicenzo.

Hamilton also served as the golf pro at Fort Lewis, south of Seattle, during the latter stages of World War II; he was also a member of the Warriors, the inter-base (intramural) team.

Individually, he placed 3rd in the Pacific Northwest Servicemen's Championship (Seattle) and 3rd in the Tacoma Open, a PGA Tour event.

[2] Hamilton was inducted into the Indiana Golf Hall of Fame in 1965, as a member of the 2nd class so honored.