- Foreign Compatriots Division, Ministry of Justice (2007)
- Residence Management Division, Ministry of Justice (2011)
- Head of Electronic Visa Centre, Seoul Immigration Bureau (2015)
- Counterterrorism Centre, National Security Council (2017)
- Head of Investigation Division, Seoul Immigration Bureau (2018)
- Investigation Division, Incheon Airport Immigration (2020)
- Head of Sejong-ro Branch, Seoul Immigration Bureau (2021)