- Ewha Womans University Mokdong Hospital Intern
- Ewha Womans University Mokdong Hospital Internal Medicine Resident
- Clinical instructor, Department of Gastroenterology, Catholic Kwandong University International St. Mary’s Hospital
- Medical professor at Catholic Kwandong University International St. Mary's Hospital
- Korean Society of Internal Medicine
- Korean Society of Liver Studies
- Korean Society of Gastrointestinal Endoscopy
