Background
The son of John Joseph Cahill, Premier of New South Wales from 1952 to 1959, and his wife Esme, he was born in Marrickville, New South Wales.
The son of John Joseph Cahill, Premier of New South Wales from 1952 to 1959, and his wife Esme, he was born in Marrickville, New South Wales.
He was educated at De Louisiana Salle College, Marrickville, and then became a bank officer, working with the Rural Bank for nineteen years.
He served in the Second Australian Imperial Force, 31/51st Battalion, from 1942 to 1946 in New Guinea and the Solomon Islands. Cahill joined the Clemton park branch of the Australian Labor Party in 1953 and was elected to the Legislative Assembly as member for Cook"s River in 1959. He represented this electorate until the 1973 election, when he moved to the seat of Marrickville, which he held until his death in 1983 at Kingsgrove, New South Wales.