Joon Hyun Kim is an American attorney who served as the acting United States Attorney for the Southern District of New York from March 2017 to January 2018. He was Deputy U.S. Attorney for the Southern District of New York from July 2015 to March 2017 after serving as the chief of the criminal division since July 2014. From April 2013 to July 2014, Kim was the chief counsel to the U.S. Attorney. Kim attended Phillips Exeter Academy, where he graduated in 1989, and graduated Phi Beta Kappa from Stanford University in 1993 and graduated cum laude from Harvard Law School, in 1996. After law school, he clerked for Miriam Goldman Cedarbaum of the Southern District of New York. From 2006 to 2013, Kim worked at Cleary Gottlieb Steen & Hamilton LLP.