Air Marshal Douglas John Stuart Riding, AO, DFC (born 6 May 1943) is a retired senior Royal Australian Air Force commander and a former Vice Chief of the Defence Force. Riding was born in the Sydney suburb of Burwood, New South Wales, on 6 May 1943. Following a secondary education at Manly Boys High School, he joined the Royal Australian Air Force (RAAF) in June 1962 as an aircrew cadet, and graduated as a pilot the following year. He was posted for operational service during the Vietnam War for a tour from April to December 1969 with the United States Air Force's 19th Tactical Air Support Squadron. As a result of his "gallant services in Vietnam", Riding was awarded the Distinguished Flying Cross.