• Subspecialist in Gastrointestinal Endoscopy
• Associate Professor of Internal Medicine, Catholic University of Korea, Catholic Central Medical Center
• Resident in Internal Medicine, Catholic Central Medical Center
• Medical Officer in Charge of Military Service Examinations, Seoul Military Manpower Administration
• Specialist in Gastroenterology, Catholic Central Medical Center
• Full Member, Korean Society of Internal Medicine
• Full Member, Korean Society of Gastrointestinal Endoscopy
• Member, Korean Society of Gastrointestinal Functional Diseases and Motility
• Full Member, Korean Society of Pain and Functional Analysis
• Full Member, Korean Society of Functional Medicine
• Full Member, Korean Society of Hypertension
• Full Member, Korean Endocrine Society
• Full Member, Korean Diabetes Association
• Full Member, Korean Society of Clinical Ultrasound
• Full Member, Korean Society of Bone Metabolism