Career
Educated at Montpelier School in Paignton and Blundell"s School in Tiverton, Grenier joined the Royal Navy in 1952. He served as commanding officer of the submarine HMS Churchill and also as Captain of the 3rd Submarine Squadron and in that role took part in the Queen's Silver Jubilee Fleet Review in June 1977. He went on to be commanding officer of the destroyer HMS Liverpool and the 3rd Destroyer Squadron in May 1981.
He was appointed a Companion of the Order of the Bath on 17 June 1989.
In retirement Grenier became a glass engraver.
