He was a Reform Party Member of Parliament in Hawke"s Bay in the 1920s. During World War I, Mason enlisted in the New Zealand Expeditionary Force in January 1916, and served overseas with the New Zealand Medical Corps, rising to the rank of temporary warrant officer class 1. He returned to New Zealand and was discharged in 1919.
Mason contested the Napier electorate in the 1922 election for the Reform Party.
Of the four candidates, he came second to Labour"s Lewis McIlvride. In 1935, he was awarded the.
Mason died in Napier in 1975 and was buried in Wharerangi Cemetery, Napier.