• Graduated from the school of Medicine, The Catholic University of Korea
• Instructor of Otolaryngology - head & neck surgery, St. Mary's Hospital in seoul, Korea
• Earned Ph.D., the graduate school, the Catholic Univ. of Korea
• Assistant Professor, Otolaryngology - head & neck surgery, St. Mary's Hospital in Seoul, Korea
• Post-doctoral visiting fellow, Laryngeal and Speech Section/MNB BINDS/ NIH, USA
• Won the Special Act Award by NIH
• Associate Professor of Otolaryngology - head & neck surgery, St. Mary's Hospital in Seoul, Korea
• Adjunct Professor of Otolaryngology - HNS, the Catholic Univ. of Korea
• Director of Medical Practitioner Committee
• Reviewer of American Journal of Respiratory and Critical Care Medicine
• Reviewer of the Laryngoscope