Outside of his military career, Harries played first-class cricket for the Free Foresters.
[5] He was seconded to the Airship Branch in April 1918, and was appointed to the Air Ministry as a staff officer in June of the same year.
[7] Following the end of the war, Harries was awarded a permanent commission in the Royal Air Force (RAF) in August 1919, at which point he was granted the rank of squadron leader.
[1] He was promoted to the rank of wing commander in January 1926 and the following month he was posted to an RAF depot in Egypt.
[14] Shortly before the outbreak of the Second World War, Harries was the air officer commanding RAF Cranwell.
[17] Following the war, he retired from active service in August 1946,[18] in addition to being made a Knights Commander of the Order of the British Empire in the 1947 New Year Honours.