Imagery of the dojo and students practicing inside
Welcome To our USSD Dojo in

Yorba Linda

Meet the Chief Instructor

Trent Zappen

Welcome to USSD Yorba Linda — where confidence is built, strength is earned, and every student discovers the power within. Whether you're stepping onto the mat for the first time or leveling up your skills, our expert instructors create a fun, focused, and empowering environment for all ages. At our studio, we don’t just teach martial arts — we help you become your best self, one belt at a time.

Additional Instructors:
  • Tanner Diaz
  • Cathleen Sayasith
  • Evan Neylan
  • Matthew Genadry
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