- Severance Hospital specialist - President of the Clinical Medical Research Association of Practitioners - President of the Korean Glyco-Nutrition Research Association - General Affairs Director, Korean Transportation Medicine Association - Academic Director of the Korean Obesity Society - Korean Obesity Research Medical Association - Korean Aesthetic Laser Society - Korean Placental Medical Research Association - Korean Scalp and Hair Society - Korean Aesthetic Laser Society - Korean Anti-Aging Society - Korean Society of Clinical Geriatrics - Korean Society of Clinical Nutrition and Health Medicine - Regular member of the Korean Aesthetic Plastic Laser Society - Regular member of the Korean Society of Aesthetic Surgery - Korean Bone Marrow Stem Cell Regular Member - Member of the Korean Laser Hair Society - Adjunct Professor, Chungnam National University College of Medicine - Adjunct Professor, Eulji University College of Medicine