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Meet our staff of professionals

Sinjin Martial Arts Staff

Christopher Sinclair & Melanie Miranda-Sinclair

Owners of Sinjin Martial Arts

Sensei Michael | Head Karate Instructor

3rd Dan Black Belt | 15+ Years Of Experience

Trained under Sensei Randy Word at Rising Sun Karate


Michael has honed his expertise in karate while also cultivating a deep passion for boxing under the guidance of renowned Coach Stan Word. As a sensei at Sinjin Martial Arts, Michael is committed to promoting not just physical fitness but also instilling essential life skills and healthy habits in  future generations. His dedication to personal growth, discipline, and community building continues to inspire his students as they embark on their own martial arts journey. 

Peter Guerrero | BJJ Instructor

Purple Belt | 15+ Years Of Experience 

Trained Under 5th degree black belt professor Chris Lisciandro at Brazilian Jiu-Jitsu club.


Coach Peter has been teaching children's jiu-jitsu for more than 10 years and has participated in various competitions, which has furthered his understanding of the sport and provided valuable insights into effect training and preparation methods.

Roger Costa | Head BJJ Professor

Our entire Brazilian Jiu-Jitsu (BJJ) program at Sinjin Martial Arts is designed from the ground up by Professor Roger Costa.

5th Degree BJJ Black Belt | 30+ Years of Experience

Trained Under Master Otavio de Almeida Junior, 9th Degree Red Belt (President,  São Paulo Jiu-Jitsu Club

Coached For Renowned Organizations : Carlson Gracie, Team Nogueira

Head Instructor at Source Jiu-Jitsu Club

Coach Advisor for Ronin Jiu-Jitsu & Judo Team

Andres Sosa Garcia | Muay Thai Instructor

Brandon Seiver | Boxing Instructor

I have been involved in martial arts for 22 years. And in those 22 years, I have achieved my blue belt in jiu-jitsu under Jean-Jacques Machado, professor, Brian Genesis. I am currently still training in jiu-jitsu to achieve my next rank and begin the tournament circuit. In regards to Karate at the age of 13 I joined the RSKA tournament team, I have done many full contact competitions a few of those ending in first place, I have done numerous WKF tournaments, I am a first-degree black belt and awarded the title of Sensei under Sensei Randy Word. I have been teaching boxing for over 10 years both commercial coaching and personal, I was training Boxing under Coach Randy Word and Coach Stan Ward. Coach Stan Ward believed I had a real future and even a good chance to make the USA Olympic amateur boxing team. I am currently being coached under Coach D, I have done numerous smoker fights up in Bakersfield representing myself  I have also trained Muay Thai for 4 years. 

Sinjin Martial Arts

21525 Centre Pointe Parkway, Santa Clarita, California 91350, United States

(661) 388-4188

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