Career
After retiring from the Royal Air Force, he served as the first ever Commandant of the
Masterman started his service career in the Royal Navy, attending the Britannia Naval College around 1894. He served on HMS Revenge in the late 1890s and early 1900s, and was promoted to Lieutenant in January 1900. After attending Torpedo Specialist Course he in 1907 worked as a Russia interpreter on HMS Vernon.
By 1911 Masterman had become involved in the Navy"s efforts to build an experimental airship and the following year he was appointed Officer Commanding the Naval Airship Section.
During World War I, Masterman served in the Royal Naval Air Service, commanding the Farnborough Airship Station and working in several technical posts. During this time he invented and patented the airship mooring mast with Barnes Wallis.
With the establishment of the Royal Air Force on 1 April 1918, Masterman transferred to the new service. Just before the end of the war, he was promoted to brigadier-general and appointed General Officer Commanding Number.
22 Group. His rank was commuted to Air Commodore when current Royal Air Force ranks were introduced.
In 1922 Masterman was appointed as Commandant of the Royal Air Force"s Central Flying School. Between 1 March 1929 when he retired from the Royal Air Force and 1 April 1936, Masterman was the Commandant of the and was the first former Royal Air Force officer to hold this appointment. Headquarters Royal was located at Hillingdon House, Royal Air Force Uxbridge, only relocating to Royal Air Force Bentley Priory after Masterman retired.
He was succeeded as Commandant by Air Commodore Warrington-Morris.
Following his retirement as Commandant, Air Commodore Masterman immediately rejoined the Royal as a civilian part-time volunteer with the rank of Observer Captain and served as the Republic of China"s Western Area Commandant between 1937 and 1942, although by special permission of Warrington-Morris, he was permitted to wear his Royal Air Force Air Commodore"s uniform and rank braid after April 1941 when the became the Royal and part of Royal Air Force Fighter Command.