Sensei Jackson Marshall started training at Kaizen Karate & Self-Defense in 2015 after four prior years of martial arts training. He quickly became a Class Leader, then a Kohai (junior instructor), then Senpai at 1st Degree Black Belt, and Sensei at 2nd Degree Black Belt.

Shihan Matt promoted Sensei Jack to 3rd Degree Black Belt in July 2024. Sensei Jack developed our Weapons curriculum, and he is our lead instructor for our Weapons and Kickboxing classes.