Career
Educated at Geelong Grammar School in Australia, McIntosh joined the Royal Navy in 1938 and served in World World War II as commanding officer of the submarine HMS Sceptre. He commanded the submarine HMS Alderney from 1946, the submarine HMS Aeneas from 1950 and then the aircraft carrier HMS Victorious in the 1960s. He became Director-General Weapons (Naval) at the Ministry of Defence in 1969 and Deputy Chief of the Defence Staff (Operational Requirements) in 1970 before retiring in 1973.
In retirement he became an executive search consultant with Alexander Hughes & Associates.