- Catholic Central Medical Center Intern
- Catholic Central Medical Center Internal Medicine Resident
- Full-time doctor, Department of Rheumatology, Bucheon St. Mary's Hospital
- Clinical assistant professor, Department of Rheumatology, Uijeongbu St. Mary's Hospital
- Assistant Professor, Catholic Kwandong University International St. Mary's Hospital
- Regular member of the Korean Society of Rheumatology
- Regular member of the Korean Society of Internal Medicine
