 Grindrod was the Bishop of Riverina from 1966 to 1971 and then Bishop of Rockhampton from 1971 to 1981.He was afterwards the Archbishop of Brisbane until 1989, additionally serving as Primate of the Anglican Church of Australia from 1982 to 1989.He took Australian citizenship in 1982 and was awarded a knighthood (KBE) in the 1983 New Year's Day Honours for services to religion.