1987. Judicial Research and Training Institute
1987. Judge, the Seoul Civil District Court
1989. Judge, Southern Branch, Seoul District Court
1991. Judge, Wonju Branch, Chuncheon District Court
1993. Judge, Northern Branch, Seoul District Court
1995. Judge, Seoul District Court
1997. Judge, Eastern Branch, Seoul District Court
1999. Judge, Patent Court
2000. Research Judge, Supreme Court of Korea
2000. Professor, Judicial Research and Training Institute
2002. Presiding Judge, 1st Criminal Department, Incheon District Court
2002. Professor, Supreme Prosecutors’ Office
2003. Dong-se Kang Legal Office
2004. Managing Partner, Myungmoon
2005. Partner, Yulchon
2008. Dong-se Kang Legal Office
2019. Partner, CLASS