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Testimonials

Student experiences

Coach Jeff with folded arms, warmly lit for the sunset hero

Blessed be the LORD my rock,
who trains my hands for war,
and my fingers for battle.

Psalm 144:1

Stories from our students

Personal experiences from the Self-Protection journey.

Fred Williams

I’ve been training with Coach Jeff for the past 10 years and never known anyone so dedicated to Self-Protection and combat sports. It’s definitely been a high point for me, having spent an enlistment in the special operations community. Whether it’s training in combat sports or Self-Protection for the street, Coach Jeff has got your back.

Coach Jeff will enlighten you with the philosophy of, “Fight if you must, avoid confrontation if you can, but safety at ALL cost.”

The physicality of the training with Coach Jeff has definitely benefited this old man. If you have the inspiration and the motivation, I say this training will have a great and positive impact on your life.

Fred Williams (74 yrs) — Army Airborne Ranger Veteran and retired boiler maker

Aron Stevens

Having trained in Martial Arts for several years, I found Coach Jeff’s curriculum and teaching ability to be practical, applicable, easy to understand, and for all shapes and sizes. I would highly recommend Jeff and the self-protection system he teaches to anyone interested in learning to protect themselves.

Aron Stevens — Professional WWE Wrestler and Actor (FKA “Damien Sandow”)

Isireli Vuli

Learning self-protection is one of the best decisions I’ve ever made for my life. With no experience whatsoever, I remember training for the first time with Coach Jeff. I had no confidence in my ability, but in short order, my confidence began to build. Coach Jeff is an awesome instructor, makes training fun, and puts it in an easy-to-understand format. Training with Coach Jeff has taught me to have an open mind and be willing to learn.

Isireli Vuli — Professional Polynesian Dancer and Martial Artist

Lowell Burton

Training with Coach Jeff is the best thing I’ve ever done for my personal safety. He’s an expert in his field, a true master of his craft, but he is also a natural educator and coach. He’s able to break down complex tactics and principles into components that can be understood and integrated at any skill level. Coach’s humor and patience make the material feel relatable and achievable, even to someone with ZERO martial arts experience.

The world can feel especially dangerous as a woman, but the knowledge and skills I’ve acquired in my training allow me to live with more confidence and less fear. I feel mentally and physically prepared for anything I might encounter. I recommend Coach Jeff’s training to all my female friends and family members for this reason.

Lowell Burton — Professional and former student

David Sampiano

Coach Jeff is not just a coach for self-protection, but also a coach in life. His method of teaching is very engaging and easily applicable. Always positive, helping others comes naturally to him. He creates a non-intimidating training environment. I love this guy. It’s easy to like him; he’s one that truly cares.

Don’t let his scary appearance intimidate you; his heart is way bigger than his beard. I call him Coach, but in reality he is my friend, a friend that sticks closer than a brother. Iron sharpens iron and he is the iron that sharpens me. He’s an inspiration to me and so many others, a man with integrity, someone who’s got my six.

David Sampiano — Range Officer, Kali Instructor, Pastor, and friend

Will Dejean

Since 2024 it has been an extreme honor and a tremendous blessing to be under the tutelage of Coach Jeff. Since my first interaction with Coach Jeff I quickly realized that he was and still is the real deal. His teachings are exactly what I want. It is reassuring to know that what I learn at every session is real life saving tactics and training. And not some cookie cutter, watered down, appease the masses, aerobics kick boxing session.

As a retired Army Infantryman I know the importance of having the right type of training to ensure you come back home to your loved ones. I thought I knew what combatives and self defense was, but that was until I met Coach Jeff! Thanks for everything Coach!

Will Dejean — Retired Army, R.O.T.C Instructor and Martial Artist

April Cadiz-Langit

Working with Coach Jeff has been an amazing experience! Coming from a background of training with a group, I’ve come to really appreciate the value of one-on-one training. Coach Jeff notices the little details & points out where I can improve or correct something—things that can easily go unnoticed in a group setting & I love how much I’m able to learn from this kind of coaching.

His wealth of knowledge & experience in martial arts & Krav Maga is truly impressive. Learning from him has been such an asset to my growth in skill, confidence & effectiveness. On top of that, he’s a person of great character & I believe that’s just as important as the knowledge & skills someone brings to the table. I’m grateful for the opportunity to learn from him!

April Cadiz-Langit — Military wife and Mother

Elizabeth Lim

Working with Coach Jeff at the YWCA Girls’ Youth Summit was a wonderful experience. He is an outstanding coach who connects with young people and makes learning self-defense engaging and empowering. The girls loved him, and I trust him completely to teach my own children. I’m grateful for the confidence and practical skills he shared with them.

Elizabeth Lim — Founder and CEO of SRTell

Wyatt Nakamura

I've trained with coach Jeff for about 2+ years and still going strong, doing Krav, Boxing, and Kickboxing/Muay Thai. I cannot stress enough how practical and relevant his teaching is for real life threatening situations. From de-escalation, to performing the necessary violence that's needed to protect yourself and or loved ones. His laser focus on structure and basic fundamentals, give you the proper tools to build a solid foundation to handle and react to these real life self defense situatuons. This solid foundation also bleeds into Boxing, Kickboxing and Muay Thai which I mentioned earlier. The depth of his technical teaching seems endless. Coach Jeff loves all of this and teaches with passion, giving you a no non-sense training, nothing fancy, only what works both on and off the street. But the main thing is Jeff is a down to earth, humble, godly man, and treats everyone with respect, easy to talk to, and just fun to be around. Don't let the beard and tattoos intimidate you😂

Proud father, Deacon, Shop foreman at Mini of Hawaii