1972-1974 drafted to the Israel Defense Forces and volunteered to the Israel Air Force (IAF) Academy where he qualified as a Weapons System Operator (WSO) and Navigator. 1974-1979 served as Operational WSO in F-4 Squadron. 1988-1989 conversion to F-16D and operational in F-16D Squadron. 1989-1998 was spent in weapons testing and operational evaluation at the IAF Flight Test Center, where he served as Head of the Avionics Section.
Lt. Col. Mayo has accumulated over 3,250 flight hours, mostly on F-4 and F-16, in addition to various fixed wing airplanes like the F-15, D&I models, F/A-18D, and helicopters.