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Sung Y. Kim served as the ambassador of the United States to South Korea from 2011 to 2014. Prior to his appointment, he was the Deputy Assistant Secretary of State for East Asian and Pacific Affairs from 2009 to 2011. Kim has also served as the Deputy Chief of Mission at the U.S. Embassy in Seoul, South Korea, from 2006 to 2009. He is a career diplomat with the U.S.