 He then attended the RAF Staff College in 1938, and spent the Second World War and his remaining career in various staff positions.His last appointment was SASO/Deputy Head of the Air Staff, British Joint Services Mission, Washington, D.C., retiring from the RAF in 1954 with the rank of Air Commodore.Swain married American Sarah Mitchell Le Fevre in Portsmouth on 5 November 1938, going on to have three children together.