He was a Progressive Conservative member of the Legislative Assembly of Ontario from 1945 to 1959 who represented the southwestern riding of Windsor—Sandwich.
In 1934, he married Mary Adele Allen, with whom he raised daughter Rosemary and adopted son William.
Griesinger served with the Canadian Expeditionary Force during World War I, reaching the rank of major, and was awarded the Military Cross at the Battle of Vimy Ridge.
After the war, he continued to serve with the local militia and was made commander The Essex and Kent Scottish with the lieutenant-colonel.
Specifically, Premier Leslie Frost had ordered all members of his Cabinet to divest themselves of shares in the company but Griesinger did not do so.