Air Vice Marshal John Nmadu Yisa-Doko was the first to attain the rank of Air Vice Marshal (AVM) in the Nigerian Air Force (NAF), he was appointed as the Chief of the Air Staff (CAS), on 29 July 1975. He enrolled into the NAF as a cadet in 1962 and was one of the pioneer officer cadets sent to the Imperial Ethiopian Air Force for pilot training between 1962 and 1964. On return from Ethiopia, he was commissioned as a Second lieutenant in 1964.During his tenure as CAS, he initiated the establishment of primary schools in all major NAF formations, as well as training schools for all NAF primary trade specialities. He established NAF Operational Bases in Markudi and Kainji. Also, he founded the NAF Regiment, NAF Junior Command and Staffs School and the Air Faculty at the Command and Staff College, Jaji. He established the NAF Technical Training School in Kaduna, to service the technical training needs of the Service. It was also during his tenure that the current NAF rank structure was introduced. Before retiring, he initiated the proposal for the presentation of Service colours to the NAF.