Michael John Costello is a former senior Australian public servant and chief of staff to former Australian Labor Party politician Kim Beazley during Beazley's tenure as Leader of the Opposition from 1996 to 2001.
Awards
Costello was made an Officer of the Order of Australia in 1996, in recognition of service to international relations, particularly in relation to the Cambodian peace settlement and the Chemical Warfare Convention. ==Personal life==
Personal life
Costello is married to Christine Wallace, Australian journalist and biographer. ==References==