At Train 4 Trauma Combative Sciences (T4TCS), we don’t just teach techniques; we honor a lineage of functional excellence. Our team is built on a foundation of mutual respect, a shared "Apprentice" mindset, and a relentless pursuit of Research & Development. We believe that to lead, one must never stop learning.
The synergy at T4TCS is found in the intersection of traditional roots and modern application—where the discipline of the past meets the high-performance demands of the present.

Eric is a T4TCS Level I Combatives Instructor, a mixed martial arts student practitioner/apprentice, under Sifu/Kru Mark Medeiros (since 2023) - His roots in martial arts began in 1996 in traditional Japanese Jiu Jitsu, and later, in the 2010s he found a love for boxing, and worked under coaches like Richard Lewis, while also conditioning
Eric is a T4TCS Level I Combatives Instructor, a mixed martial arts student practitioner/apprentice, under Sifu/Kru Mark Medeiros (since 2023) - His roots in martial arts began in 1996 in traditional Japanese Jiu Jitsu, and later, in the 2010s he found a love for boxing, and worked under coaches like Richard Lewis, while also conditioning EOFL (Eastern Ontario Fight League) competitors (including championships).
Throughout this journey, Eric was exposed to various combative style landscapes and disciplines, gaining a deep understanding of the value of the traditions and lineage connected to the arts and combatives. This commitment to the 'source code' of the work is what informs the collaborative training and information shared at T4TCS today.
He believes that it is a true honour and privilege to learn from and train with Sifu Mark, and Kru Jakub. The culture and history of the combat arts that exists is truly a blessing.

Founder of NAKRB Muay Thai, and JKDCS, Sifu/Kru Mark Medeiros has been training since 2002 and holds numerous ranks under many different styles.
Before he became the combative architect for T4TCS, Sifu/Kru Mark began teaching his system in 2013 and has since coached his students to win gold at multiple WKF junior championships at provincia
Founder of NAKRB Muay Thai, and JKDCS, Sifu/Kru Mark Medeiros has been training since 2002 and holds numerous ranks under many different styles.
Before he became the combative architect for T4TCS, Sifu/Kru Mark began teaching his system in 2013 and has since coached his students to win gold at multiple WKF junior championships at provincial and national levels. He truly embodies a true mixed martial artist and demonstrates his love and passion for the arts through his teaching at T4TCS, and anywhere else he is asked or volunteers to teach.
Certifications:
•Sifu in JKD under Sifu Kevin Seaman
•Kru in Muay Thai under 3x world Champ Kru Medhi Pouroskoui
•Brown Belt in TJJ under Renshi Scott Taylor
•Blue Belt in BJJ under DNA-BJJ
•Level 3 in Balintawak Taboada under Guro Joe Apostol
•Intermediate level in FMA Inosanto Blend under Kevin Seaman
•Second Degree Black Belt in Moh Pai Kenpo under Sifu C. Stone
•Red Sash Sr. in Wing Chun Sunny Tang lineage
•Use of Force scenario training with Chimera
•MTO Coaching/Cornerman Certified
•WACO Coaching Certified

Jakub has been a dedicated martial artist. An avid practitioner of Muay Thai, he has also explored wrestling, Jiu-Jitsu, and Kali. His passion for martial arts led him to become an instructor under Kru Mehdi from KB-One, where he has taught Muay Thai at Kombat Arts. Recently, he has been assisting Kru Mark Medeiros under NAKRB Muay Thai,
Jakub has been a dedicated martial artist. An avid practitioner of Muay Thai, he has also explored wrestling, Jiu-Jitsu, and Kali. His passion for martial arts led him to become an instructor under Kru Mehdi from KB-One, where he has taught Muay Thai at Kombat Arts. Recently, he has been assisting Kru Mark Medeiros under NAKRB Muay Thai, continuing to share his expertise and passion for martial arts.
He is one of the most generous coaches with his knowledge in fitness and nutrition, and the arts he is passionate about. Kru Jakub has a a proven demonstrated ability to coach students/practitioners during fight camps, ringside, and post fight let down phases. Furthermore, he plays an instrumental role in the development of leadership among the student he teaches and coaches. He is one of the key ingredients that truly makes T4TCS what it is.
Jakub's multifaceted journey reflects his relentless pursuit of excellence, both in his artistic endeavours and his personal passions. His story is one of continuous learning, dedication, and the drive to push boundaries in everything he undertakes.
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