· Deputy Mayor of Safety Management Office Seoul Metropolitan Government (SMG) (Jul.2020-Present)
· Deputy Mayor of Seoul Metropolitan Infrastructure Headquarters, SMG (Jul.2018 -Jun.2020)
· General Director of Water Circulation Safety Bureau, SMG (Aug.2015.-Dec.2017)

- Visiting professor of University of Seoul
- Worked in Seoul Metropolitan Government
ㆍ’18.01 ~ ‘18.06 Director, Safety Management Headquarters
ㆍ’15.07 ~ ‘17.12 Director, Urban Infrastructure Headquarters
ㆍ’15.01 ~ ‘15.06 Vice Director, Office of Waterworks
ㆍ’12.01 ~ ‘13.06 Director, Facility Safety Bureau, Urban Safety Office
ㆍ’09.01 ~ ‘10.03 Director, Road Management Bureau, Urban Transportation Headquarters

· Has been with CityNet for the past 11 years where he has been in charge of multiple programs including those related to Disaster Risk Reduction, Climate Change, Education as well as outreach programs in Japan
· Founder of Mitra Disaster Risk Reduction Learning Center which is the first DRR learning Center in Nepal established in 2019

· Clinical Associate Professor of Myongji Hospital, Department of Psychiatry (Present)
· Director of Seoul Suicide Prevention Center (Present)
· Director, Gyeonggi Mental Health Center (2012~2015)
· Director, Ansan Mental Health Trauma Center (2014)
· Director, Korea Psychological Autopsy Center (2015)
· Vice President, Korean Society of Traumatic Stress Studies (2014~2019)
· Principal, School Star (2002~)