He was educated in the Gilgandra district and later went to the University of Sydney, where he studied law; he was admitted as a solicitor in 1951.
He served in the Citizen Military Forces with the 6th New South Wales Mounted Rifles from 1950 to 1952.
He also had a further two children, Andrew Lee Hamilton Clark and Michael Dudley John Clark[1] Serisier joined the Labor Party in 1953, holding positions in the office branch, state and federal electorate councils, and the central executive.
In 1970 he was elected to the New South Wales Legislative Council, becoming Labor's leader in that chamber in 1973 and holding the position until 1976.
He retired from politics at the 1978 state election, when the size of the Council was reduced.