- Jun. 2022: Commissioner, NTS
- Jul. 2021: Commissioner, NTS Busan Regional Office
- Jan. 2021: Commissioner, NTS Jungbu Regional Office
- Sep. 2020: Assistant Commissioner for Individual Taxation Bureau, NTS
- Jul. 2018: Inspector General, NTS
- Jul. 2017: Assistant Commissioner for Investigation Bureau 2, NTS Seoul Regional Office
- Dec. 2016: Assistant Commissioner for Compliance & Risk Management Bureau, NTS Jungbu Regional Office
- Dec. 2015: Assistant Commissioner for Collection & Litigation Bureau, NTS Jungbu Regional Office
- Jul. 2014: Assistant Commissioner for Collection & Legal Affairs Bureau, NTS Busan Regional Office
- Oct. 2013: Inspector General, NTS Seoul Regional Office
- Aug. 2012: Human Resource Planning Office, The Office of President