ClassHankyul 법무법인(유한) 클라스한결

1. 2014 ~ 2017 Director, Ministry of National Defense Planning and Coordination Office
2. 2010 ~ 2012 Director, Facilities Bureau of the Ministry of National Defense; Director, Defense Acquisition Program Administration Acquisition Planning Bureau
3. 2009 ~ 2010 Planning and Budget Bureau, Ministry of National Defense
4. 2007 ~ 2009 Health and Welfare Bureau, Ministry of National Defense

- 2017 ~ 2019 Manager, Agency for Defense Development
- 2017 ~ 2019 Member, Ministry of National Defense Defense Improvement Committee and Defense Acquisition Program Administration Policy and Planning Division / Munitions Procurement Division