About The Technician Dojo in Columbus, Ohio

Ryu-Saiichi-Do Kenpo Karate Jutsu, Judo, Jujutsu, Firearms, and Holistic Services on Parsons Avenue in South Columbus.

Our Story

About The Technician Dojo in Columbus, Ohio

Master Steven Hatfield brings decades of martial arts experience and a practical, no-nonsense approach to training at The Technician Dojo. His background spans traditional and modern martial arts, with a foundation in Goju Ryu (Okinawan Karate) and training completed in Japan and Okinawa.

The system he created, Ryu-Saiichi-Do Kenpo Karate Jutsu, is a modern expression of those traditional foundations, designed for practical self-defense in the real world. Rather than treating Karate, Judo, and Jujutsu as separate disciplines, Master Hatfield helps students understand how striking, throwing, grappling, joint manipulation, and defensive tactics work together.

Students are encouraged to explore why techniques work, recognize when they are appropriate, and develop the ability to apply fundamental principles under changing circumstances. Progression is individually based. The Technician Dojo is not a belt factory.

Karate Black Belts

Practitioners who have earned rank through The Technician Dojo across our martial arts programs.

Hanshi Gary Z. Wilson — 8th Degree Black Belt RSD Karate, 2nd Degree Black Belt TAD Aiki Jujutsu
Shihan Zach Speakman — 5th Degree Black Belt RSD Karate Teaching License: Valid
Master Matt Warren — 4th Degree Black Belt RSD Karate, Green Belt Kontei Judo, White Belt GJJ Teaching License: Expired
Sensei Bret Gordon — 2nd Degree Black Belt WKD Karate, 3rd Degree Black Belt Kontei Judo, Blue Belt GJJ Teaching License: Valid
Johnnie Cobb — 2nd Degree Black Belt RSD Karate Teaching License: Expired
Sensei TJ Andrews — 1st Degree Black Belt RSD Karate Teaching License: Expired
Sensei K. Payne — 1st Degree Black Belt RSD Karate Teaching License: Expired
Sensei Saydie Carter — 1st Degree Black Belt RSD Karate Teaching License: Valid
Sensei Fabian Aparicio — 1st Degree Black Belt RSD Karate Teaching License: Valid
Sensei Abel Gaym — 1st Degree Black Belt RSD Karate Teaching License: Valid
Sensei Legna Norwood — 3rd Degree Black Belt RSD Karate Teaching License: Expired
Mr. Dice Norwood — Black Belt RSD Karate Teaching License: N/A
Mr. Paul Kaple — Black Belt RSD Karate Teaching License: N/A
Mia Davis — Yudansha Black Belt RSD Karate Teaching License: N/A
Ms. Becca Davis — Yudansha-Ho Apprentice Black Belt RSD Karate Teaching License: N/A

Our Mission

"Develop capable, adaptable martial artists with the skills, confidence, and understanding necessary to protect themselves and others."

Coaches

Meet the Technician Dojo Team

Master Steven Hatfield

Headmaster

Master Steven Hatfield is the creator of Ryu-Saiichi-Do Kenpo Karate Jutsu and headmaster of The Technician Dojo. He trained in Karate in Japan and Okinawa, with a foundation in Goju Ryu, and was named headmaster of Wae-Kune Do Karate in 2024.

View Profile

Master Jennifer (Ame) Davis

Instructor

Master Jennifer (Ame) Davis holds a 4th Degree Black Belt in RSD Karate, a Purple Belt in Kontei Judo, a 4th Degree Purple Belt in Gracie Jiu-Jitsu, and Tenshinkido Menkyo Shoden License Level 1.

View Profile

Sensei Simone (DOT) Hager-Alexander

Instructor

Sensei Simone (DOT) Hager-Alexander holds a 1st Degree Black Belt in RSD Karate, a Purple Belt in Judo and Gracie Jiu-Jitsu, and Tenshinkido Menkyo Shoden License Level 1.

View Profile