1974. Judicial Research and Training Institute
1975. Judge Advocate Officer, Korean Army
1977. Judge, Cheongju District Court
1980. Judge, Suwon District Court
1982. Judge, Southern Branch, Seoul District Court
1984. Judge, the Seoul Civil District Court
1985. Judge, Seoul High Court
1998. Litigation Director-General, Office of Court Administration
1989. Judicial Researcher, Supreme Court
1990. Presiding Judge, Cheongju District Court
1992. Presiding Judge, Suwon District Court
1993. Presiding Judge, Southern Branch, Seoul District Court
1995. Presiding Judge, Seoul District Court
1996. Presiding Judge, Daegu High Court
1999. Presiding Judge, Seoul High Court
1999. Chief Presiding Judge, Incheon District Court
2000. Presiding Judge, Seoul High Court
2000. Professor, Judicial Research and Training Institute
2004. Chief Judge, Chuncheon District Court
2005. Chief Judge, Incheon District Court
2005. Chief Judge, Seoul District Court, Seoul Administrative Court
2006. Managing Partner, Hanseung
2009. Managing Partner, ChungJeong
2020. Legal Advisor, CLASS