[1] In World War II, he joined the Royal Australian Air Force, reaching the rank of Flying Officer.

Hewitt then worked as manager for Australian Estates in Eidsvold till 1956 at which time he entered Queensland politics.

At the 1972 election his seat was abolished and he moved to the electorate of Auburn, holding it till his retirement from politics in 1980.

From 1969 till 1980 Hewitt held several Ministerial roles including Water Resources, Aboriginal and Islander Advancement, and Local Government.

Fifteen grandchildren Kate, Lachlan, Nathan, Cameron, Anna, Rebecca, Thomas, Jessica, Kimberley, Callan, James, Bethany, Hamish, Charles and Fletcher.