- Hanyang University Hospital Resident
- Clinical instructor at Samsung Medical Center
- Severance Hospital clinical instructor
- Assistant Professor, Eulji University Hospital
- Research supervisor at Cornell University Hospital in New York
- Boston Tufts University research instructor
- Associate Professor, Professor, Kyung Hee University Hospital
- Department of Cardiology, Catholic Kwandong University International St. Mary's Hospital
- Catholic Kwandong University International St. Mary's Hospital 1st Deputy Director
- Professor at Catholic Kwandong University International St. Mary's Hospital
- Outstanding Teacher Award for the First Half of Fiscal Year 2015
