- Yonsei University Hospital Intern
- Internal medicine resident at Yonsei University Hospital
- Clinical instructor, Department of Endocrinology, Yonsei University Sinchon Severance Hospital
- Clinical Research Assistant Professor, Department of Endocrinology, Sinchon Severance Hospital, Yonsei University
- Assistant Professor, Catholic Kwandong University International St. Mary's Hospital
- Lifetime member of the Korean Society of Lipid and Arteriosclerosis
- Lifetime member of the Korean Society of Obesity
- Lifetime member of the Korean Diabetes Association
- Lifetime member of the Korean Endocrine Society
- Regular member of the Korean Society of Internal Medicine
