Ambassador Theros has held such positions as Political Advisor to the Commander in Chief, Central Command; Deputy Chief of Mission and Political officer in Amman; Charge D’affaires and Deputy Chief of Mission in Abu Dhabi; Economic Counselor in Damascus; and U.S. Ambassador to the State of Qatar. In a career spanning almost 36 years, he also has served in diplomatic positions in Beirut, Managua, Dharan and Abu Dhabi, as well as in the Department of State. During that period, he earned four Superior Honor Awards. After retirement Ambassador Theros served as President of the U.S. Qatar Business Council in 2000-2017.