I want to extend a sincere thank you to Lieutenant Commander Kegan “SMURF” Gill, U.S. Navy (Ret.), former F/A-18 Super Hornet pilot, for making this connection possible with Justin Sheehan
Kegan’s commitment to helping high-performance professionals is phenomenal, and he continues to bring important voices and real-world experience to a wider audience. Kegan — I appreciate the trust and the bridge you built here.
Justin Sheehan is a former SEAL Team Six operator, Brazilian Jiu-Jitsu instructor, and coach whose experience spans elite special operations, traumatic brain injury recovery, and high-performance training. His career placed him in environments where discipline, adaptability, and resilience were not concepts — they were survival requirements. Today, he applies those lessons to coaching athletes, civilians, and professionals seeking durability in both body and mind.
Justin’s perspective is shaped by hard realities. He speaks openly about the hidden toll of traumatic brain injuries — not only from combat, but from repeated concussive exposure through training, firearms use, and contact sports. The cumulative damage is often misdiagnosed, manifesting as depression, hormonal disruption, sleep issues, and cognitive decline. His message is direct: the small hits add up, and awareness, assessment, and recovery must be taken seriously.
Discipline, in Justin’s view, is not rigidity — it is maintenance. In military life, accountability is built in; in civilian life, it must be intentional. Sleep, nutrition, hydration, and consistent movement form the foundation of recovery and longevity. Alcohol, poor sleep, and inactivity erode performance faster than age ever will. Movement is medicine. Intensity — scaled to reality — preserves capability.
He draws clear parallels between special operations and athletics: both involve trauma, recovery, stress adaptation, and mental resilience. Training must reflect reality. Live sparring, pressure testing, and scenario-based training build the mindset and competence required when stakes are real. Sport fighting has rules; self-defense does not. The goal is survival and creating the opportunity to escape.
As a coach, Justin emphasizes humility, specialization, and continuous learning. Elite teams rely on experts; effective coaching requires knowing your limits and building networks of competence. He also stresses the importance of empowering others — especially women — with practical self-defense skills and the confidence to act under pressure.
At its core, Justin Sheehan’s message is about resilience built through discipline, awareness, and purposeful training. Protect the brain. Maintain the body. Train for reality. Stay adaptable. Capability is not preserved by accident — it is maintained through consistent, deliberate effort.
🔗 Connect with Justin on
Instagram:https: https://www.instagram.com/justin.sheehan.779/
For BJJ- Detachment North BJJ- Traverse City, Michigan.
Email: Sheehan1876@gmail.com
I am Damian Porter , Former NZ Special Forces Operator, Subject Matter Expert from www.hownottodieguy.com and www.eatwellmovewell.net
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