He held senior positions at the Ministry of Foreign Affairs including director-general of the Middle East Directorate, chief advisor to the President of Turkey, and spokesperson.
He first joined the Turkish Ministry of Foreign Affairs in 1978 and served in Kabul and Strasbourg before attending the NATO Defence College in Rome in 1987/88.
In 1993, ambassador Diriöz joined the NATO International Staff as head of the Defence Policy Section and in 1996 he returned to the Ministry of Foreign Affairs in Ankara.
[6] Hüseyin Diriöz served at the NATO International Staff as assistant secretary-general from October 2010 for a duration of three years.
In addition, the Division is responsible for the political-military and defence related aspects of cooperation with partners and International Organisations.