1999 Air Force Judge Advocate
2002 Seoul District Prosecutor's Office, Seobu Branch Prosecutor
2004 Daegu District Prosecutor's Office Pohang Branch Prosecutor
2006 Busan District Prosecutor's Office Prosecutor
2009 Supreme Prosecutor's Office Prosecutors' Research Institute
2011.2. Seoul Central District Prosecutor's Office
2011.9. Seoul Central District Prosecutor's Office Deputy Chief Prosecutor
2011.10. Senior Administrative Officer, Office of the 2nd Secretariat for Civil Affairs, Office of the President
2013.2. Seoul High Prosecutor's Office Prosecutor
2013.4. Gwangju District Prosecutor's Office Public Security Department Chief Prosecutor
2014.1. Seoul Western District Prosecutor's Office Criminal Division 5 Chief Prosecutor
2015.2. Chief Prosecutor’s Office Criminal Information Division 1
2016.1. Seoul Central District Prosecutor's Office Advanced Crime Investigation Division 2 Chief Prosecutor
2017.8. Suwon District Prosecutor’s Office Human Rights and Advanced Crime Division Chief Prosecutor
2018.3. Suwon District Prosecutor's Office High-Tech Industrial Protection Investigation Head
2020.2. Seoul Central District Prosecutor's Office 2nd Deputy Chief Prosecutor
2020.9. Suwon District Prosecutor's Office Anyang Branch Chief
2021.6. Supreme Prosecutor's Office Public Prosecutor's Office
2022.6.-2023 Jeju District Prosecutor's Office (71st Chief of the Jeju District Prosecutor's Office)