Our Team

A PERSONAL PROTECTION TRAINING TEAM YOU CAN TRUST

We are an experienced, qualified, and inclusive personal protection training center serving Contra Costa County.

Contact us today!

About us

Welcome to Split Second Response, where we are dedicated to providing the highest quality self-defense and personal protection training available.

At Split Second Response, we believe that everyone should have the skills and knowledge they need to protect themselves and their loved ones. That's why we offer a wide range of self-defense and personal protection training programs, including martial arts and personal safety classes, firearms training, first aid and CPR certification, security training, active shooter training, and more. Our expert instructors are committed to providing personalized attention and customized instruction to help every student achieve their goals and stay safe in any situation.

We are proud to be a leader in the self-defense and personal protection training industry and are dedicated to continuing our tradition of excellence in everything we do. Whether you're a beginner or an experienced practitioner, we welcome you to join our community and start building the skills and confidence you need to stay safe and protected.

our staff: Martial arts | Firearms | First Aid | SECURITY training

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Dr. Tim Calvin, Ed.D., MBA, CEO & Founder

Dr. Tim Calvin is the founder and CEO of Split-Second Response, Inc. Dr. Calvin began training in the martial arts in 1994 and founded the Conditioned Combat Response self-defense system. Dr. Calvin earned a 5th-degree Black Belt in Kajukenbo, a 5th-degree black belt in Senkotiros Arnis, becoming a Certified Level 2 Krav Maga Instructor, a certified Kickboxing Instructor, and a blue belt in BJJ.

Before teaching martial arts, Dr. Calvin was a police officer for 8-years. Dr Calvin worked for the Oakland Police Dept. for 2 years, working Patrol and as an Undercover Narcotics Officer. Dr. Calvin left O.P.D. and went to the Novato Police Dept., where he worked for 6-years. While at N.P.D., Dr. Calvin served as a Defensive Tactics Instructor, ASP Baton Instructor, and on Novato's S.W.A.T. team.

Before venturing into a career in law enforcement, Dr. Calvin served 6-years in the United States Marine Corps, serving as a H.A.W.K. Missile Operator, shooting surface-to-air missiles.

Dr. Calvin has a bachelor's degree in business management from Western Governors University (WGU), an MBA from WGU, and a Doctorate in Organizational Change and Administration from Cal Baptist University (CBU).

Dr. Calvin is also an NRA, USCCA, DOJ, and BSIS Firearms Instructor, an NRA Range Safety Officer (RSO), an NRA RTBAV Instructor, a BSIS Baton Instructor, an AVERT Active Shooter Instructor and Instructor Trainer, an American Red Cross and Health and Safety Institute (HSI) Adult and Pediatric First Aid/CPR/AED Instructor, an Axon Taser Instructor, and an ASP Baton, Tactical Flashlight, and Handcuffing Instructor.

James Nelson, Director of operations

Jamie Nelson is Split Second Responses' Director of Operations. Jamie started working at Split Second Response in 2006, when we were D1 & Only Martial Arts as a Black Belt Instructor and the Program Director for our Discovery Bay location. Jamie is a 3rd-degree black belt in Kajukenbo under Dr. Tim Calvin and has trained in martial arts for over 20 years. Jamie became our Sr. Program Director in 2018 at our Antioch location, and he is now a part owner of the company and the Director of Operations overseeing our instructors and support staff.

Sifu Jamie has a bachelor's degree in business management with an emphasis in Sustainable Energy. He also owns a travel agency and is a former teacher at Pittsburg High, and a former postal worker where he served as a site safety coordinator. In addition, Sifu Jamie is an AVERT Active Shooter Instructor and Instructor trainer.

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Jarell Calvin, Master instructor

Jarell Calvin is the Master Instructor and Site Manager of Split-Second Response, Inc. Master Calvin began training in the martial arts in 1997, earning a 5th-degree Black Belt in Conditioned Combat Response, a 4th-degree Black Belt in Kajukenbo, a 5th-degree black belt in Senkotiros Arnis, and becoming a Certified Level 1 Krav Maga Instructor.

Master Jarell is an AVERT Active Shooter Instructor and Instructor Trainer, an American Red Cross and Health and Safety Institute Adult and Pediatric First Aid/CPR/AED Instructor, and an ASP Baton and Handcuffing Instructor.

Master Jarell has an Associate of Arts (AA) Degree in general education from Los Medanos College. He is a former national champion of fighting and forms and the captain of our amazing Demo Team.

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Ron plaga, sr., head instructor

Ron Plaga is the Head Instructor at Split-Second Response. Sifu Ron is also a 1st-degree Black Belt in Conditioned Combat Response (CCR), an AVERT Active Shooter Instructor, and he is certified in HSI Adult and Pediatric First Aid/CPR/AED.

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Brian Adlao:                              Firearms Instructor

U.S. Air Force (2010 to Present)

  • Staff Sgt., (E-5)

  • Military Police

Education

  • B.S. Degree (Political Science) from Sacrament State University

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Darius “DJ” Rackley: Co-Director Firearms Training SERVICES

California Highway Patrol (CHP)

  • Patrol

  • Traffic Division

  • Field Training Officer (FTO)

Firearms Instructor

  • USCCA Concealed Carry & Home Defense Instructor

U.S. Navy (4-years)

  • Corpsman
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Carmen Santana: co-Director Firearms Training Services

Richmond Police Department: 11 years

  • Patrol

  • Explorer Program Advisor

  • Recruiting

  • School Resource Officer

  • Bravo Team Specialty Unit

Firearms Instructor

  • USCCA Concealed Carry & Home Defense Instructor

American Red Cross Adult and Pediatric First Aid/CPR/AED Instructor

Education

  • Associate of Science (A.S.) Degree from Contra Costa Community College in Administration of Justice

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Karen wRIGHT: Administrative Director

First American Title Company: 10 years

  • Commercial Escrow Officer