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

Yorba Linda

Meet the Chief Instructor

Trent Zappen

With over three decades of martial arts mastery, Chief Instructor Trent Zappen is a force of passion, power, and precision.

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
  • Cath Sayasith
  • Evan Neylan
  • Matthew Genadry
Welcome To our USSD Dojo in

Yorba Linda

Located on Yorba Ranch Road, USSD Yorba Linda is led by Chief Instructor Trent Zappen, a 5th Degree Black Belt.

His dojo offers specialized programs like weapons training and women's self-defense, empowering students of all ages to build resilience, precision, and purposeful strength in a structured, welcoming environment—no matter where they start.

Meet the Chief Instructor

Trent Zappen

With over three decades of martial arts mastery, Chief Instructor Trent Zappen is a force of passion, power, and precision.

Read More
Other Instructors:
  • Tanner Diaz
  • Cath Sayasith
  • Evan Neylan
  • Matthew Genadry
Additional Services:
  • Women's Self Defense
  • Weapons Training
  • Anti-Bullying Classes
  • Corporate Team Building
  • Birthday Parties

Our Students Say:

Excellent studio. The sensei’s are world class and teach valuable life lessons. My kids have benefited both physically and emotionally and have an increased confidence in their abilities.

Robby S.
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