Grandmaster Chang Hee Yoon went to College in Seoul, Korea to get his college education and to train in Tae Kwon Do, Judo, Hapkido and other martial arts at the Korean Judo College now known as Yong In University. Grandmaster Yoon trained in the traditional techniques and forms that are used today by the Kukkiwon World Taekwondo Headquarters. He also served in the Korean National Army and became Korea’s National Judo Champion, his favorite martial sport, and was invited to sit with the International Judo Federation (IJF) President at the 1988 Seoul Olympics. After he completed College, he came to the United States to teach Tae Kwon Do, Judo and Hapkido. He came to St. Louis in 1970 where his brother-in-law Grandmaster Bong Yul Shin founder of Gateway Moo Do Kwan schools in 1963 also lived, and Grandmaster Yoon founded Chang’s Martial Arts that grew into a large number of schools throughout the metropolitan St. Louis area including Belleville, St. Charles, Kirkwood, South County and Arnold. Grandmaster Yoon and Grandmaster Shin are some of the “Founding Fathers” of Korean Taekwondo and Judo in America, and are on the Board of Directors for the Korea Judo Association in U.S.A.

Since Grandmaster Yoon founded Chang’s Martial Arts, he has trained, mentored, and promoted hundreds of officially certified Kukkiwon Black Belt students in the traditional style martial arts and competition training of Tae Kwon Do, Judo and Hapkido. This includes the Head Instructors of his three current schools: Dien Nguyen head instructor of Dien’s Martial Arts in Eureka, Bob Wheeler head instructor of Missouri Martial Arts in House Springs, and Jackie Donahue head instructor of World Martial Arts Studio in Belleville. Grandmaster Yoon currently holds 8^th Degree Black Belts in Tae Kwon Do from the Kukkiwon World Taekwondo Headquarters, Judo from the International Judo Federation & Korea Judo Association, and Hapkido from the Korea Hapkido Federation. He has two sons, Jaeyoung and Jaemin, and a daughter Jackie. Jaeyoung, Jaemin and Jackie all hold Black Belts in Tae Kwon Do and Judo.

Grandmaster Yoon is important to Dien’s Martial Arts, Missouri Martial Arts and World Martial Arts because he represents the 2^nd Generation Lineage of Instructors and his teachings come directly from the Kukkiwon, official World Headquarters of Tae Kwon Do. This means that the head instructors of the schools are 3^rd Generation, and that Dien’s Martial Arts, Missouri Martial Arts and World Martial Arts students follow the teachings, high standards and competition training of Grandmaster Yoon, and are learning authentic traditional Martial Arts from the Kukkiwon and the other official International, Korean and United States Governing Organizations.

Grandmaster Yoon’s teachings are the basis for the consistency of all the Martial Arts teachings. Without Grandmaster Yoon’s teachings, the Schools would not have the advanced knowledge to give their first-rate authentic training of martial arts and winning competition skills to their students. Grandmaster Chang Hee Yoon has provided the official and knowledgeable information to the Schools about Tae Kwon Do, Judo and Hapkido that makes him deserve the highest respect from all the students of Dien’s Martial Arts, Missouri Martial Arts and World Martial Arts .