As an administrator, Jack Hamilton was associated with baseball, rugby, athletics and hockey. In hockey, Jack was the Governor of the Saskatchewan Junior Hockey League.
Jack served as a member of the Canadian Olympic Committee for 17 years (1931 – 1948).
Hamilton held the presidencies of the Saskatchewan Amateur Hockey Association 1926/27, Canadian Amateur Hockey Association 1931/32, the Saskatchewan Amateur Basketball Association 1933/34, and the Amateur Athletic Union of Canada 1937/38.
