Located at 110 Grand Ave in Hackettstown, NJ
A Place For The Rest Of Us
to Grow.
the way of the ronin
NJ Ronin is a collection of new and seasoned Jiu Jitsu practitioners, MMA fighters, boxers, and kick boxers who have been searching for the right training atmosphere. Ronin literally means, “he who drifts/wanders”. Ronins were made to feel like outsiders that didn’t belong. If you’ve ever felt like you didn’t fit in or just never really felt comfortable at a gym or another academy we would love to welcome you here with open arms. Come be a part of our family and wander no more!
Your Vibe will determine your
tribe
NJ Ronin is dedicated to creating a welcoming atmosphere for all visitors. Located in Hackettstown, NJ we are warren county’s newest academy specializing in Jiu Jitsu, Striking (Boxing, MMA and Kickboxing) and Self Defense. We provide classes for the entire family 6 days a week. Private lessons and personal training are also available and can be scheduled around hours that work for you. Your first class is always free and beginner friendly. Come visit today to see the difference for yourself.
View the schedule
Work Hard
Have.
Fun.
Fun.

JIU JITSU
Our Jiu Jitsu classes are taught by highly qualified bjj practitioners with diverse backgrounds, techniques, and perspectives whose primary goal is to help you reach your full potential.

Children’s Jiu Jitsu
We offer childrens Jiu Jitsu 4 days a week! Ages 5 to 15 are welcome to come have fun being with a group of passionate bjj practitioners. Get your kids off their cell phones and onto the mats!
MMA / BOXING

Home of the American Strikers, Coach Don and team focus on clean striking techniques that work for beginners and high level athletes. We have successfully worked with UFC, Bellator, and other top promotions.
RONIN HF

Ronin Health and Fitness offers classes that will meet your schedule and pace! We use a mixture of kettlebells, battle ropes, and other equipment to make unique circuits that will get you results. Lose weight, get healthy, and have fun doing it. Give us a call today to try your first class for free.
JUDO

A sport of unarmed combat derived from jujitsu and intended to train the body and mind. It involves using holds and leverage to unbalance the opponent.
Instructors
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Aidan Phillips Coach
Aidan is a no gi specialist who trains under the 10th Planet system. Aidan brings unique perspectives and submissions to the Ronin family every Wednesday night.
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Dan Jantzen Coach
Dan brings his passion for Jiu Jitsu Fundamentals every Monday. He is a student under Renzo Gracie Black Belt, Jamie Cruz (Cruz Control BJJ) and has been instructing children in Martial Arts since 2012. He is also the competition coach and has been actively competing in grappling competitions since 2011.
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Don Cioffi Coach
Former professional and amateur boxer, former Golden Gloves, Diamond Gloves and Interstate Champion. Coach Don is the owner of American Strikers and is focused on developing well rounded strikers. He has been very successful helping many professional boxers, amateur boxers and MMA fighters achieve their goals.
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Matt Nicolls Coach
Matt is an active fighter with a passion for teaching. He has experience coaching Jiu Jitsu, Fitness, and Striking classes. He is always striving to increase his knowledge in the field and truly enjoys helping others achieve their goals.
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Jamie Cruz Professor
Jamie Cruz is a 3rd Degree Brazilian Jiu Jitsu black belt under Renzo Gracie, and is regarded as one of the top grappling instructors in the state of New Jersey – US, where he has trained some of the best jiu jitsu and mixed martial arts (MMA) competitors in the region. Jamie brings his high pressure system to the Ronins every Thursday at 7pm.
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Eric Roncoroni Coach
Eric has been training since 2009. He mainly focused on BJJ from the start and then quickly transitioned into becoming an MMA striker. He’s fought for some of the best east coast regional MMA promotions such as Cage fury fighting championship, Ring of combat, Art of War and many others. He won his first Belt as an ameatur but then went on to become the Ring of Combat Champion at middleweight!
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Kelly Ryan Judo
Kelly is a knowledgeable Brown Belt in Judo and an active competitor. She shares her knowledge with us every Thursday and has been teaching at NJ Ronin since 2018
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Ryan Gellner Jiu Jitsu
Ryan is an active Jiu Jitsu competitor and coach. He leads Takedown Tuesdays and also assists with kids classes.
Pressure.
reps.
rounds.
rounds.