- Passed the 31st Judicial Examination in 1989.
- Completed training at the Judicial Research and Training Institute (21st class) and became a prosecutor at Cheongju District Prosecutor's Office in 1992.
- Prosecutor Jinju District Prosecutor's Office, Changwon District Prosecutor's Office in 1994.
- Prosecutor Jeonju District Prosecutor's Office in 1995.
- Prosecutor Seoul District Prosecutor's Office in 1997.
- Prosecutor Daejeon District Prosecutor's Office in 1999.
- Prosecutor Suwon District Prosecutor's Office, Ansan Branch in 2002.
- Deputy Chief Prosecutor at Suwon District Prosecutor's Office, Ansan Branch in 2004.
- Chief Prosecutor at Tongyeong Branch of Changwon District Prosecutor's Office in 2005.
- Chief Prosecutor at Criminal Division 5 of Daegu District Prosecutor's Office in 2006.
- Chief Prosecutor at Trial Department of Incheon District Prosecutor's Office in 2007.
- Chief Prosecutor at Yeongdeok Branch of Daegu District Prosecutor's Office in 2008.
- Chief Prosecutor at Criminal Division 4 of Uijeongbu District Prosecutor's Office in 2009.
- Prosecutor Seoul Southern District Prosecutor's Office, Criminal Division 4 in 2009.8.
- Chief Prosecutor at Criminal Division 2 of Gwangju District Prosecutor's Office in 2010.8.
- Prosecutor Seoul High Prosecutors' Office as a prosecutor in 2011.9.
- Chief Prosecutor at Criminal Division 2 of Incheon District Prosecutor's Office in 2013.4.
- Prosecutor Daegu High Prosecutors' Office as a prosecutor in 2014.1.
- Prosecutor Seoul High Prosecutors' Office as a prosecutor in 2016.1.
- Head of the Special Economic Crimes Investigation Division at Seoul Eastern District Prosecutors' Office in 2017.8.
- Head of the Special Economic Crimes Investigation Division at Suwon District Prosecutor's Office from September 2020 to July 2022.