Membership
Hewitt was a Liberal member of the Legislative Assembly of Queensland from 28 May 1966 to 22 October 1983, representing the electorate of Chatsworth from 28 May 1966 to 12 November 1977 and Greenslopes from 12 November 1977 to 22 October 1983, when he was defeated by Leisha Harvey at the 1983 election.