In 1997 John helped open the first San Diego dojo at the USA Training center as Sijo Fraser's assistant instructor. Since then he has been featured on Planet X TV, KUSI, and FOX, showcasing JING-SHEN's seminars. Sifu Duza has also instructed at the GATHERING OF THE MASTERS and GATHERING OF THE EAGLES and a variety of other international seminars with Masters from around the world. John has had the fortunate opportunity through JSK to help design FIGHT CLUB INTERNATIONAL, a martial arts video game for Sony PLAYSTATION, in which himself, Sijo Fraser, and a select few fighters were asked to perform as motion capture actors/fight choreographers.
John is a Certified Personal Trainer under the NSPA (National Strength Professionals Association) certification. He has been training and teaching Martial Arts for 24 years now, with 13 years under Grand Master Greg Fraser's Jing-Shen Kuoshu and 10 years as a personal trainer. John has worked at the Sporting Club/Aventine, LA Fitness, Frog's ClubONE, Fitness Advantage, and Club La Jolla