Prosecutor, Chungju District Public Prosecutors’ Office/Uijeonbu District Public Prosecutors’ Office/Seoul Central District Public Prosecutors’ Office/Suwon District Public Prosecutors’ Office (1974)
Senior Prosecutor, Gwangju District Public Prosecutors’ Office/Incheon District Public Prosecutors’ Office; Professor, Judicial Research & Training Institute (1987)
Judicial Officer, Ministry of Justice, Civil Litigation Department; Deputy Chief Prosecutor, Seoul Eastern District Public Prosecutors’ Office/Daegu District Public Prosecutors’ Office (1992)
Head of Branch, Seoul District Public Prosecutors’ Office, Uijeonbu/West/East Branch (1997)
Director General, Protection Bureau, Ministry of Justice; Head of Legal Affairs Division (Chief Prosecutor)(1999)
Chief Prosecutor, Suwon District Public Prosecutors’ Office (2000)
Head of Department, Violent Crimes Department, Supreme Public Prosecutors’ Office (2002)
Private Practice (2003)
Managing Partner, Dongin Law Group (2004-2013)
Honorary Managing Partner, Dongin Law Group (2014-Present)