Jun Cheol Yoon was born in Seoul, Korea, on February 3, 1960. He began his study of the Ancient martial art of Tae Kwon do at the age of nine, under the supervision of his Master, Grand Master Wan Kyu Park. After hard concentration and study, he was awarded his 1st Dan Black Belt at the age of 11 and gained two national championship titles.

In 1976, Master Yoon attended Sung Dong High School where he trained under Grand Master Jin Chung. It was here that Grand Master Yoon attained his World Championship and Asian Game titles.

Following a successful high school career, Grand Master Yoon continued in the competition circuit in addition to attending the Korea National College of Physical Education. While taking his master degree, Grand Master Yoon taught physical education and Tae Kwon Do at In Cheon High School.

In1983, Grand Master Yoon began his international travel as a Korean National Demonstration Team Member and World Class Coach. After his many professional visits to the United States, Grand Master Yoon decided to relocate to California, East Bay area in 1992. He opened his first martial arts studio in Castro Valley, California and now instructs at his Dublin, California Studio with his two sons.

• PhD - Sports Management
• M.S. Degree - Physical Education
• Certified Tae Kwon Do Instructor
• 8th Dan Black Belt
• 5th Dan Kum Do Black Belt
• 4th Dan Hap Ki Do Black Belt
• Gold Medalist 1976 World Games
• 23-time Korean National Champion
• 1978 Best Tae Kwon Do Competitor in Korea
• 1983-90 Korean National Demonstration Team Member
• 1988 Olympic Demonstration Team Member
• 1990 Korean National Team World Cup Coach
• 1997 "World All Star Team" Head Coach
• 2002 USA National Team Coach
• 2006 USA National Team Coach
• International Referee
• Las Positas College Physical Education (PE) Instructor