Dr. Geun-Soo Lee is a board certified dermatologist of Korea. He received M.D. and Ph.D. degree from Hanyang University, Seoul, Korea. Currently, he is the Director of Laser Center in Dr. Woo & Hann’s Skin and Laser Clinic. In terms of social activities, he is taking charge of Auditor of Korean Dermatological Association. He had been contributed to the scientific committee of the Association of Korean Dermatologist as one of the organizer. He contributed to Koreaderma 2019 as chief course director. And, he is secretary of The Korean Society for Aesthetic and Dermatologic Surgery and he is secretary of international cooeration at Korean Society of Laser Surgery and Medicine. He has given a number of lectures on laser treatments, light source, energy based devices, and other topics related on aesthetic dermatology at the domestic, regional, or international conferences such as Easy Asia Dermatology Conference, Korea-Japan Joint Meeting of Dermatology, International Confederation of Plastic Reconstructive and Aesthetic Surgery, International Master Course on Aging Science, and World Congress of Dermatology. He wrote scientific papers in Dermatologic surgery, Laser Therapy, Annals of Dermatology, and Journal of Dermatological Treatment. He presented a few topics in American Society for Laser Medicine and Surgery. He participated as a co-author Textbook of Dermatologic Surgery written in Korean. He wrote a book named "Principle and clinical application of fractional lasers" in Korean as one of the representative writers. His major concerns are acne treatments, pigmented skin disease treatments including melasma, dermal melanosis, lentigines, or photodamages, and skin rejuvenation treatment by use of fractional technology, non-ablative skin rejuvenation lasers, ultrasound, radiofrequency, and light sources.