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Venerated U.S. Ambassador Thomas Shannon retired in February 2018 after an almost 35-year career at the State Department. He started off as a consular/political officer in Guatemala in 1984 and ended as the third highest-ranking official in the agency as undersecretary for political affairs. He also briefly served as acting secretary of state during the fraught transition to the Trump administration, eventually handing the reins to former Secretary of State Rex Tillerson.
Shannon joined the Board of Directors of the Inter-American Dialogue in 2018 and will begin his tenure as co-chair of the Dialogue in January 2019.
