- Full-time doctor at Gangnam Cha Hospital
- Director of Green Cross Medical Foundation
- Gangnam Severance Hospital specialist
- Clinical Professor at Konyang University Hospital
- Clinical assistant professor at Gil Hospital
- Green Cross Medical Foundation Manager
- Director of Pathology Department, Seegene Medical Foundation
- Soonchunhyang University Bucheon Hospital
- Incheon Sejong Hospital Manager
- Clinical Associate Professor, International St. Mary's Hospital, Catholic Kwandong University
