• Head Professor & Chief of Plastic Surgery Dept., Yeungnam University Hospital
• Exchange Professor, Pittsburgh University, PA, USA
• Training Course, MD ANDERSON Cancer Center
• Council & Official Member, Korean Society of Plastic and Reconstructive Surgeons
• Director & Official Member, the Korean Society for Aesthetic Plastic Surgery
• Official Member, the Korean Association of Plastic Surgeons
• Director, Korean Breast Cancer Society
• Official Member, the Korean Society for Microsurgery / Korean Cleft Palate-Craniofacial Association
• Official Member, International Confederation of Plastic and Reconstructive Surgery
• Director, Korean Society for Biomaterials & Korean Society for Stem Cell Research
• Chairman, International Federation of Adipose Therapeutics and Science in 2009