- 1993. Military Prosecutor, ROK Special Warfare Command
- 1996. Prosecutor, Busan District Prosecutors’ Office
- 1998. Prosecutor, Jeongeup Sub-district in Jeon Ju District Prosecutors’ Office
- 1999. Prosecutor, Seoul Central District Prosecutors’ Office
- 2001. Prosecutor, Gwang Ju Distrcit Prosecutors’ Office
- 2003. Researcher, Supreme Prosecution Service
- 2006. Chief Prosecutor, Soon Cheon Sub-district in Gwang Ju District Prosecutors’ Office
- 2007. Chief Prosecutor, Seoul Western District Prosecutors’ Office
- 2008. Chief Prosecutor, Inspection Department, Ministry of Justice
- 2009. Chief Prosecutor, Special Investigation Department of Soo Won District Prosecutors’ Office
- 2009. Section Chief, 2nd Supervision Department of Supreme Prosecution Service
- 2010. Chief Prosecutor, Seoul Southern District Prosecutors’ Office
- 2011. Research Committee Member of Institute of Justice
- 2012. Director Prosecutor, Chung Ju Sub-District, Cheong Ju District Prosecutors’ Office
- 2013. Director Prosecutor, An Yang Sub-District, Soo Won District Prosecutors’ Office
- 2014. Director Prosecutor, Chun Cheon District Prosecutors’ Office
- 2015. Partner Attorney, Min & C