• SaBumNim Yong Ji In
  • Master Chin Yun Chung
  • Grandmaster Sang B. Ko
  • Soke John Davis
  • Grandmaster Jong Yuk Ki
  • Grandmaster J. Choi
  • Grandmaster Billy Davis
  • Grandmaster Chih-Young Lin
  • SaBumNim John Grossman

    • Grandmaster Sang B. Ko

    Grandmaster Sang B. Ko is 8th degree Black Belt in HapKiDo, Vice President of the World HapkiDo Federation, and Special Trainer for the Korean Elite Forces.