Ambassador Theros was a career Foreign Service Officer from 1963 to 1999. Key positions he held in the Foreign Service include Ambassador to the State of Qatar, 1995–1998; Deputy Coordinator for Counterterrorism, responsible for the coordination of all U.S. Government counter-terrorism activities outside the United States, 1993–1995; Political Advisor to the Commander in Chief, Central Command, 1993 -1991; Deputy Chief of Mission and Political Officer in Amman, 1987- 1991; Director, Politico-Military Affairs, State Department, 1983–1986; Chargé d'Affaires and Deputy Chief of Mission in Abu Dhabi, 1980–1983; and Economic and Commercial Counselor in Damascus, Syria, 1976–1980. He also served in other diplomatic positions in Saudi Arabia, Lebanon, and Nicaragua, as well as, in the Department of State.
In non-governmental positions, Theros serves currently as President and Executive Director, US Qatar Business Council, Washington; General Partner, Theros & Theros LLP, Washington; Representative of the Greek Orthodox Patriarch of Jerusalem to the United States; Member of the Board of Advisors, Center for Contemporary Arab Studies, Georgetown University in Washington; Former Member of the Board of Directors, Qatar Foundation International; Member of the Council on Foreign Relations; Member of the Arab American Bankers Association of America; Member of the Washington Institute of Foreign Affairs; and Owner’s representative, West Bank-Gaza-Jordan Fund. Member of the Order of St. Andrew. Theros is active in promoting ties between the United States and Qatar.
He is fluent in Spanish, Arabic, and Greek. Education: Graduated from Georgetown University’s School of Foreign Service in 1963 and has done advanced study at the American University in Washington, DC, and the Universidad Centro Americana in Nicaragua.