Background
Dunbier was born in Guildford, the son of Ron Dunbier, who also served in the Assembly.
Dunbier was born in Guildford, the son of Ron Dunbier, who also served in the Assembly.
He attended Newington College (1950–1952) before working in his father"s car dealership.
He was the Liberal member for Campbelltown in the New South Wales Legislative Assembly from 1968 to 1971. He later owned a farming property in Campbelltown. Dunbier joined the Liberal Party in 1964.
He was elected to Liverpool City Council in 1966, serving until 1969.
He was defeated in 1971 by Cliff Mallam, a former Labor Member of Parliament. Dunbier then contested preselection for the federal seat of Macarthur, defeating sitting member and fellow Old Newingtonian Jeff Bate.