Chieftain tank
Gouriet became the second in command of a company of the Somaliland Scouts from 1959 until the Scouts were disbanded in late 1960. He was promoted to captain on 16 December 1961, became Adjutant of the Trucial Oman Scouts from 1961 to 1963, and then served as General Staff Officer Grade III Intelligence 1965–66 to the Director of Operations in Borneo. After attending Staff College, Camberley, where he earned a recommendation to return on the Teaching Staff as a Lieutenant Colonel, he was promoted to Major and became a Squadron Leader in 15/19 Hussars, a Chieftain tank regiment in Germany. He finished his Army career as Deputy Assistant Adjutant and Quartermaster-General at the Ministry of Defence, responsible for Q Operations and Plans, in 1971 to 1972.