1992. Judicial Research and Training Institute
1993. Prosecutor, Cheongju District Prosecutors’ Office
1995. Prosecutor, Andong Branch, Daegu District Prosecutors’ Office
1997. Prosecutor, Seoul District Prosecutors’ Office
1999. Prosecutor, Daegu District Prosecutors’ Office
2002. Prosecutor, Incheon District Prosecutors’ Office
2004. Prosecutor, Daegu District Prosecutors’ Office
2005. Prosecutor, Daegu District Prosecutors’ Office
2005. Supreme Prosecutors’ Office
2007. Chief Prosecutor, Milyang Branch, Changwon District Prosecutors’ Office
2008. Professor, Supreme Prosecutors’ Office
2009. Supreme Prosecutors’ Office
2010. Director Prosecutor, Seoul District Prosecutors’ Office
2011. Chief Prosecutor, Pohang Branch, Daegu District Prosecutors’ Office
2013. Supreme Prosecutors’ Office
2014. Deputy Chief Prosecutor, Changwon District Prosecutors’ Office
2015. Deputy Chief Prosecutor, Daegu District Prosecutors’ Office
2015. Chief Prosecutor, Supreme Prosecutors’ Office
2017. Chief Prosecutor, Changwon District Prosecutors’ Office
2018. Chief Prosecutor, Busan District Prosecutors’ Office
2018. Chief Prosecutor, Seoul Northern District Prosecutors’ Office
2019. Chief Prosecutor, Seoul High Prosecutors’ Office
2020. Managing Partner, CLASS