Sungkyu Lee Partner
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  • TEL 82 2 6003 7547
  • FAX 82 2 6003 7038
  • E-MAIL
Sung Kyu Lee is a partner at Yoon & Yang LLC and his main practice area is criminal law.
Mr. Lee began his public career as a prosecutor at the Southern Branch of the Seoul District Prosecutor’s Office, then served as a prosecutor at the Criminal Management Division of the Prosecution Bureau of the Ministry of Justice and the Seoul Central District Prosecutor’s Office. Mr. Lee also served as a research officer at the Supreme Prosecutor’s Office and a director at the International Criminal and Public Safety Management Divisions of the Ministry of Justice. Thereafter, Mr. Lee served as the chief prosecutor at the Public Safety Division 2 of the Seoul Central District Prosecutor’s Office and Criminal Division 1 of the Incheon District Prosecutor’s Office. Finally, He served as the deputy chief prosecutor at the Anyang Branch of the Suwon District Prosecutor’s Office and the Jeonju District Prosecutor’s Office, and the chief of the Western Branch of the Busan District Prosecutor’s Office.

Mr. Lee has extensive experience in labor matters including unfair labor practices, violations of the Labor Standards Act, industrial accidents, as well as election matters relating to false statements of facts, inducement of purchases and interest, donations, and establishment of similar institutions. He was involved in the drafting of practice guides on investigations, such as the “Commentary on Penal provisions of the Public Office Election Act” published by the Supreme Prosecutor's Office.

Mr. Lee obtained an LL.M. from Columbia Law School and is admitted to practice in the state of New York. Mr. Lee is also a Certified Public Accountant. Mr. Lee has extensive international work experience and was involved in practical consultations with the U.S. Department of Justice on issues including extradition and cooperation in criminal justice matters.


  • 2021-present Yoon & Yang LLC
  • 2021 Prosecutor, Seoul High Prosecutor’s Office
  • 2020-21 Chief, Western Branch, Busan District Prosecutor’s Office
  • 2020 Deputy Chief Prosecutor, Jeonju District Prosecutor’s Office
  • 2019-20 Deputy Chief Prosecutor, Anyang Branch, Suwon District Prosecutor’s Office
  • 2018-19 Chief Prosecutor, Human Rights & High-Technology Crime Investigation Team, Criminal Division 1, Incheon District Prosecutor’s Office
  • 2017-18 Deputy Chief Prosecutor, Suwon District Prosecutor’s Office (Secondment to the Korea Institute of Criminology)
  • 2016-17 Chief Prosecutor, Public Safety Division 2, Seoul Central District Prosecutor’s Office
  • 2015-16 Director, Public Safety Management Division, Prosecution Bureau, Ministry of Justice
  • 2014-15 Director, International Criminal Division, Prosecution Bureau, Ministry of Justice
  • 2013-14 Chief Prosecutor, Public Safety Division, Daejeon District Prosecutor’s Office
  • 2011-13 Research Officer, Supreme Prosecutor’s Office
  • 2009 Training Program, Nassau County District Attorney’s Office, New York,
  • 2008-11 Prosecutor, Seoul Central District Prosecutor’s Office
  • 2006-08 Prosecutor, Criminal Management Division, Prosecution Bureau, Ministry of Justice
  • 2004-06 Prosecutor, Suncheon Branch, Gwangju District Prosecutor’s Office
  • 2002-04 Prosecutor, Southern Branch, Seoul District Prosecutor’s Office
  • 1999-02 Judge Advocate, Ministry of National Defense Procurement Headquarters, Korean Air Force


  • 2020 Korea University School of Law, Graduate School of Legal Studies, Ph.D. candidate
  • 2009 Columbia School of Law, LL.M.
  • 1999 Judicial Research and Training Institute
  • 1997 Seoul National University, College of Law, LL.B.