Master Young Soo Chang Master Young Soo Chang Treasurer, Chang's Tae Kwon Do America Secretary General, Massachusetts Kukkiwon U.S. Tae Kwon Do Committee Past Head Coach, Hodori International Demonstration Team Past Tae Kwon Do Instructor, Korean Military Two time Champion Marksman, Korean Military Past Secretary General, Greater Massachusetts Tae Kwon Do Association Secretary General, Boston Korean American Amateur Sports Association