Education
Royal Military Academy Sandhurst.
Royal Military Academy Sandhurst.
Educated at Uppingham School and the Royal Military Academy Sandhurst, Reilly was commissioned into the Royal Warwickshire Regiment in 1954. He was given command of the 2nd Battalion Royal Regiment of Fusiliers in 1971. He was appointed an Instructor at the Staff College, Camberley in 1974, Commander of 6th Field Force and the United Kingdom Mobile Force in 1979 and General Officer Commanding 4th Armoured Division in 1981.
He went on to lead the Directorate of Business Delivery at the Ministry of Defence in 1983, to become Assistant Chief of Defence Staff at the Ministry of Defence in 1985 and to be Commander for Training and Arms Directors in 1986 before he retired in 1989.