- Chuncheon Sacred Heart Hospital Intern
- Resident at Gangdong Sacred Heart Hospital
- Severance Hospital clinical instructor
- Severance Hospital clinical research assistant professor
- Clinical instructor at Chuncheon Sacred Heart Hospital
- Deputy Director, PI, Catholic Kwandong University International St. Mary's Hospital
- PI Director, Catholic Kwandong University International St. Mary's Hospital
- Associate Professor, Catholic Kwandong University International St. Mary's Hospital
