Mr Tyson is a senior career officer with the Department of Foreign Affairs and Trade and was most recently Australia's Ambassador to Iraq, a position he held since August 2008. Mr Tyson has also served as Ambassador to Russia and Saudi Arabia, with earlier postings to Washington, Honolulu, Moscow, Bangkok and Wellington.
Mr Tyson holds a Bachelor of Arts with honours in History and Political Science from the Australian National University. He is married with two children. Mr Tyson speaks Arabic.