[2] In 1932, he became manager of the Ogilvie Flour Mills elevator in Saltcoats, Saskatchewan, returning to Manitoba in 1936.
[2] He first ran for the Manitoba legislature in the 1958 provincial election, but lost to Liberal-Progressive incumbent Walter McDonald by 73 votes in the riding of Dufferin.
[4] The Progressive Conservatives won a majority government in the 1959 provincial election, and Hamilton defeated McDonald by 154 votes to take the seat on his second try.
He was re-elected by greater margins in the elections of 1962 and 1966,[1] and served as a backbench supporter of the governments of Dufferin Roblin and Walter Weir.
After retiring from politics, he worked as constituency secretary for federal member of parliament Jack Murta.