[1] His rank, as a career member of the Senior Foreign Service, was Minister-Counselor.
[2] In 2021, Sievers became the inaugural director of the American Jewish Committee office in Abu Dhabi.
He was the first person to serve as Diplomat-in-Residence at the Washington Institute for Near East Policy (2014–15).
Within the State Department, he's served as U.S. deputy chief of mission and chargé d'affaires in Cairo and various posts all over the Middle East including Baghdad, Tel Aviv and Algiers.
He was a senior adviser to Iraq's Ministry of Foreign Affairs as part of the Coalition Provisional Authority (CPA) - a position for which he volunteered.