Career
Nimmo also acted as chief military observer to the United Nations Military Observer Group in India and Pakistan from 1950 until his death in 1966. Nimmo died in his sleep, of a heart attack, on 4 January 1966 at Rawalpindi, Pakistan, and was buried in the Anzac section of Mount Gravatt cemetery, Brisbane, with full military and United Nations honours. Senior representatives of both India and Pakistan attended his funeral.