He served as Chief of the Air Staff ( CAS ) , the RAAF 's highest-ranking position , from 1979 until 1982 , and as Chief of the Defence Force Staff ( CDFS ) , Australia 's top military role at the time , from 1982 until 1984 .
He served as the RAAF 's highest-ranking position , Chief of the Air Staff ( CAS ) , from 1979 until 1982 . He was also Chief of the Defence Force Staff ( CDFS ) , Australia 's top military role at the time , from 1982 until 1984 .