As a professor of otolaryngology at Korea University Anam Hospital, IM, GIJUNG is dedicated to the treatment and research of the entire field of otology, which is related to the "ear; EAR". Graduated from Korea University College of Medicine in 1996, since 2004, specialist in otology, 2010-2012: postdoctoral research fellow (Patch clamp of cochlea, Electrophysiology) at Johns Hopkins University in Baltimore, USA. Clinically, specialized in cochlear implants that restore hearing & COM operation. In 2025, The Korean Pediatric Otolaryngology Society (Vice President) & Korean Society of Otolaryngology (Director of Public relations) in SOUTH KOREA.