Our Founder

9th Dan Black Belt | World Champion | Founder of Sky Martial Arts

Grand Master Jun Yoon was born in Seoul, South Korea and began his study of Tae Kwon Do at the age of nine. Within two years, he was awarded his 1st Dan Black Belt and gained two National Championship titles. During high school, Grand Master Yoon was already a seasoned player and the top ranked competitor in Asia. At the age of 18, he became the World Games gold medalist.

Following a successful high school career, Grand Master Yoon continued in the competition circuit and attended the Korea National Sport University. While studying for his Masters Degree, Grand Master Yoon taught physical education and Tae Kwon Do at Incheon High School.

In 1983, Grand Master Yoon was selected as an official National Demonstration Team Member and World Class Coach, during which he travelled around the world and became one of the most important figures in the spread of Olympic Tae Kwon Do. After his many professional visits to the United States, Grand Master Yoon decided to relocate to California in 1992. While Sky Martial Arts was being established, Grand Master Yoon also received his PhD in Sports Management.

For over 25 years, Grand Master Jun Yoon has shared his elite knowledge of Martial Arts in the Bay Area and has developed countless national-level and world-class athletes. Now, his two sons, Master Joseph and Master Andrew, along with their training partner, Master Justin, bring their world-class instruction to the Los Altos and Silicon Valley area!

"If you have one goal, one focus, then you can achieve anything." -Grand Master Jun Yoon


Education & Certification

  • Ph.D – Sports Management
  • M.S. – Physical Education
  • Bachelor Degree – Physical Education
  • Kukkiwon-certified 9th Dan Taekwondo Black Belt
  • Ohun Kumdo-certified 5th Dan Kumdo Black Belt
  • KHA-certified 5th Dan Hapkido Black Belt
  • Kukkiwon-certified International Instructor
  • Kukkiwon-certified Int'l Black Belt Examiner
  • World Taekwondo-certified International Instructor
  • WT-certified International Sparring Referee
  • WT-certified International Poomsae Referee


Championship Titles

  • World Games Gold Medalist
  • 23-time Undefeated Korean National Champion
  • 15-time Chairman's Int'l Open Gold Medalist
  • 3-time President's Cup Gold Medalist
  • Asian Games Gold Medalist
  • Voted Best Taekwondo Competitor in Korea
  • Korean National Demonstration Team Member
  • Seoul Olympics Demonstration Team Member
  • US Open Gold Medalist (Poomsae & Sparring)
  • USATKD National Championship Gold Medalist (Poomsae & Sparring)



  • President, California Unified TKD Association
  • Director, American TKD Open Championship
  • Founder, Sky Martial Arts Int'l Academy

  • USA National Team Head Coach (2006)
  • USA National Team Head Coach (2002)
  • World All Star Team Head Coach (1997)
  • Korean National Team World Cup Coach (1990)

  • Referee Instructor, US Olympic Committee
  • Referee Chairman, US National Collegiate TKD Association
  • World Championship Referee (2011)
  • World University Games Referee (2011, 2012, 2014)
  • World Poomsae Championship Referee (2013)

  • UC Berkeley Physical Education Instructor
  • Las Positas College Physical Education Instructor