. Teacher, Educator and Producer
. International Education Advisor of Vocal Asia
. President of Korea A Cappella Education Society
. Teacher’s Education Director of Korea Music Education Society
. Chairperson of Incheon Airport International A Cappella Competition
. Author of Korea Music Text Book
. Author of 'A cappella', 'Hello School! Let's Sing Acappella', 'Acappella Edu Classic' etc.
. Producer of 15 A Cappella CD