Tudor Harvey Barnett AO ( 25 December 1925 -- 23 June 1995 ) was an Australian intelligence officer who was Director - General of Security from 1981 to 1985 .
Director - General of Security is the head of the Australian Security Intelligence Organisation ( ASIO ) .
Tudor Harvey Barnett AO ( 25 December 1925 -- 23 June 1995 ) was an Australian intelligence officer who was Director - General of Security , the head of the Australian Security Intelligence Organisation ( ASIO ) , from 1981 to 1985 .