3385 Deer Valley Road, Antioch, California 94531

Split-Second Response Martial Arts Instructors

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Dr. Tim Calvin, Ed.D., MBA

CEO / Founder

Tim Calvin
is the founder of Split-Second Response: Personal Protection and Security Training Services and the Conditioned Combat Response (CCR) Self-Defense System. Dr. ...


Carmen Santana

Chief Operations Officer

Carmen is our Chief Operations Officer (COO). Carmen is a former police officer with the Richmond Police Department, having worked in law enforcement for 12 years. Carmen is ...


James Nelson

Chief Marketing Officer (CMO)

James (Jamie) Nelson has trained in martial arts for over 20 years. Jamie is a 3rd-degree Black Belt in our Conditioned Combat Response Self-Defense System and a 3rd-degree Black ...

Debbie Delgado Instructor in Antioch

Debbie Delgado

Chief Financial Officer (CFO)

Simu Debbie Delgado is our Chief Financial Officer (CFO). Simu Debbie has trained in the martial arts for over 20 years and is a 2nd Degree Black Belt. Simu Debbie left corporate ...


Jarell Calvin

Director of Operations (Martial Arts Program)

Jarell Calvin is the Director of Operations and Master Instructor of our Martial Arts Department. Master Jarell has trained in martial arts for 26 years, and he has taught ...


Ronald Plaga, Sr.

Head Instructor

Ron is a 1st Degree Black Belt and the Head Instructor at Split Second Response. Ron is a former QA and IT specialist, and a former supervisor and facilities manager. ...


Tiera Calvin

Black Belt Instructor

Simu Tiera Calvin is Master Tim's daughter and a 3rd-degree Black Belt. Simu Tiera has trained in martial arts for 14 years and is a Senior and Honor Roll student at Liberty High ...


Join Us Here In Antioch Today For The Best Martial Arts Training In Town!

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BSIS Number: TFF1672, TFB1400