NATHAN S. KEYSOR
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Bernd Diedrich
Life Member - Martial Arts International Federation (MAIF) TM
Life Member - United States Martial Arts Federation (USMAF) TM
Member - United States Shotokan Karate (USSK) TM Committee
Martial Arts Practitioner & Instructor
Martial arts practitioner with over five decades of continuous training, teaching, and organizational experience. Primary focus on traditional Karate, complemented by formal Taekwondo training and cross-disciplinary practice including Kickboxing, Boxing, and Self-Defense.
TRAINING & RANK HISTORY
• 1972 – Began martial arts training in traditional Karate
Early training at Sportstudio Oyama (Berlin) under Ingo Freyer
• 1970s – Continued Karate training, including Kyokushinkai Karate, examinations up to 4th Kyu
• 1975 – Transition to Taekwondo at Sportschule Doksuri
Training under Grandmaster Kim Bo-Young (Chang Moo Kwan style(
• 1980 – Achieved 1st Dan (Black Belt) in Taekwondo and kick boxing
• 1980s–present – Ongoing advanced practice in Karate, Kickboxing, teak kwon do, Boxing and Self-Defense
INSTRUCTION, LEADERSHIP & ORGANIZATION
• Co-owner of Sportschule Cobra, Berlin-Kreuzberg
• Head Instructor, responsible for children, youth, and adult programs
• Long-term instructor activity emphasizing discipline, structure, and personal development
• Community-based martial arts engagement (“soziale Feuerwehr” initiatives)
LICENSING & FORMAL QUALIFICATIONS
• DOSB Übungsleiter License (Germany)
• DOSB Trainer B License (Germany)
SEMINARS & SPECIAL TRAINING
• Participation in seminars and training sessions with internationally recognized martial artists, including:
• Bill “Superfoot” Wallace
• Benny Urquidez
CURRENT PRACTICE
• Ongoing independent training and technical exchange with fellow senior practitioners.
Ongoing independent training and technical exchange with senior practitioners, including regular practice with Christian Becker.
Professional Biography -
Experienced martial arts instructor and sports educator with a strong background in club management, instructor development, and community-oriented training programs.
Professionally trained chef, with many years of practical experience, and later active as a streetworker, using martial arts as a tool for social engagement, conflict prevention, and youth development.
Former co-owner and head instructor of a Berlin-based martial arts school, holding certified DOSB qualifications and decades of hands-on teaching experience across multiple disciplines.
Sensei Bernd Diedrich Contact Info -
Email: [email protected]
Life Member - Martial Arts International Federation (MAIF) TM
Life Member - United States Martial Arts Federation (USMAF) TM
Member - United States Shotokan Karate (USSK) TM Committee
Martial Arts Practitioner & Instructor
Martial arts practitioner with over five decades of continuous training, teaching, and organizational experience. Primary focus on traditional Karate, complemented by formal Taekwondo training and cross-disciplinary practice including Kickboxing, Boxing, and Self-Defense.
TRAINING & RANK HISTORY
• 1972 – Began martial arts training in traditional Karate
Early training at Sportstudio Oyama (Berlin) under Ingo Freyer
• 1970s – Continued Karate training, including Kyokushinkai Karate, examinations up to 4th Kyu
• 1975 – Transition to Taekwondo at Sportschule Doksuri
Training under Grandmaster Kim Bo-Young (Chang Moo Kwan style(
• 1980 – Achieved 1st Dan (Black Belt) in Taekwondo and kick boxing
• 1980s–present – Ongoing advanced practice in Karate, Kickboxing, teak kwon do, Boxing and Self-Defense
INSTRUCTION, LEADERSHIP & ORGANIZATION
• Co-owner of Sportschule Cobra, Berlin-Kreuzberg
• Head Instructor, responsible for children, youth, and adult programs
• Long-term instructor activity emphasizing discipline, structure, and personal development
• Community-based martial arts engagement (“soziale Feuerwehr” initiatives)
LICENSING & FORMAL QUALIFICATIONS
• DOSB Übungsleiter License (Germany)
• DOSB Trainer B License (Germany)
SEMINARS & SPECIAL TRAINING
• Participation in seminars and training sessions with internationally recognized martial artists, including:
• Bill “Superfoot” Wallace
• Benny Urquidez
CURRENT PRACTICE
• Ongoing independent training and technical exchange with fellow senior practitioners.
Ongoing independent training and technical exchange with senior practitioners, including regular practice with Christian Becker.
Professional Biography -
Experienced martial arts instructor and sports educator with a strong background in club management, instructor development, and community-oriented training programs.
Professionally trained chef, with many years of practical experience, and later active as a streetworker, using martial arts as a tool for social engagement, conflict prevention, and youth development.
Former co-owner and head instructor of a Berlin-based martial arts school, holding certified DOSB qualifications and decades of hands-on teaching experience across multiple disciplines.
Sensei Bernd Diedrich Contact Info -
Email: [email protected]
