Prior to assuming this position, Ambassador Markarian served as Deputy Minister of Foreign Affairs of Armenia since June 2000.
In that capacity, his responsibilities included the Ministry's Departments of Politico-Military Affairs; International Organizations; CIS Countries; and Asia-Pacific and Africa.
In 2002–2003, Ambassador Markarian was also special representative of the president of Armenia for Nagorno Karabakh negotiations.
Previous diplomatic assignments of Ambassador Tatoul Markarian included a term as deputy chief of mission and minister-counselor at the Armenian Embassy in Washington, D.C., from December 1994 to January 1999.
Before joining the Armenian Foreign Service, Ambassador Markarian served in newly independent Armenia's legislative and executive branches.