Current Yonsei University College of Medicine Dermatology Classroom Adjunct Professor Current Adjunct Professor, Sungkyunkwan University College of Medicine, Department of Dermatology, Yonsei University College of Medicine, Yonsei University College of Medicine, Department of Dermatology, Yonsei University College of Medicine, Department of Skin Biology, Professor, Shinchon Severance Hospital, Dermatology Specialist (skin cancer, cosmetic skin surgery, laser surgery specialist) Gangnam Severance Hospital Skin Surgical specialist (skin cancer, cosmetic skin surgery, laser surgery specialist) Director of Department of Dermatology, Department of Defense Medical School, University of California, San Francisco (USCF) Dermatology, SKIN Surgery and Center Visiting Professor, Beautiful Today Oh Kims Dermatology, Jang Dermatology Former Director of Dermatology Hongil Kook

Now Yonsei Swell Dermatology Clinic Director