Joseph Estey Macmanus[1] (born 1953) is an American diplomat who served as Executive Secretary of the United States Department of State from 2014 to 2017.[2] Prior to that, he served as the U.S. Ambassador to International Organizations in Vienna from 2012 to 2014,[3] as well as interim coordinator for efforts to implement President Barack Obama's Iran Nuclear Deal in 2015.[4]
Macmanus is a career foreign service officer, having entered the Foreign Service Institute in 1986. In his time at the State Department, he served as top aides to former Secretaries of State Condoleezza Rice and Hillary Clinton. He served as Deputy Assistant Secretary of State for Legislative Affairs from 2005 to 2008, and again from 2011 to 2012.[8]
President Barack Obama appointed Macmanus to serve as U.S. Representative to the Vienna Office of the United Nations, as well as its representative to the International Atomic Energy Agency (IAEA) in December 2011.[9] He came to international attention in 2013 when he accused Iran of deception at a meeting of the IAEA,[10]
and then, with the Canadian, Australian and New Zealand envoys,[11] stormed out of the meeting after Iran criticised Israel.[12][13]
