About Randy Brown Mantis Boxing & Brazilian Jiu-Jitsu
Welcome to Randy Brown Mantis Boxing & Brazilian Jiu-Jitsu, where we are dedicated to providing the highest quality Brazilian Jiu-Jitsu training in a supportive, family-friendly environment. Our mission is to empower students of all ages and skill levels through the art of BJJ, fostering physical fitness, mental resilience, and personal growth.
Our Philosophy
At Randy Brown Mantis Boxing & Brazilian Jiu-Jitsu, we believe that Jiu-Jitsu is more than just a martial art—it's a way of life. Our approach combines technical excellence with practical application, ensuring that our students develop skills that work both on and off the mats.
Whether you're looking to compete at the highest levels, learn self-defense, or simply get in the best shape of your life, our expert instructors are here to guide you every step of the way.
Meet Our Instructors

John Smith
Head Coach - Black Belt
15+ years of experience competing at the highest levels.

Maria Rodriguez
Kids Program Director - Brown Belt
Specializes in teaching children of all ages and abilities.

David Chen
Competition Coach - Black Belt
Multiple-time IBJJF champion with a focus on competitive training.
Class Schedule
We offer a variety of classes for all skill levels, from beginners to advanced practitioners. Join us at a time that works for your schedule!
Membership Options
Invest in your health, fitness, and self-defense skills with our flexible membership options. Join our community today and start your Jiu-Jitsu journey!
Basic
Perfect for beginners looking to start their Jiu-Jitsu journey.
- Unlimited Fundamental Classes
- Access to Open Mat Sessions
- Free Uniform (Gi)
- Monthly Progress Assessments
Premium
Our most popular option with full access to all classes and amenities.
- Unlimited Access to All Classes
- Access to Open Mat Sessions
- Free Uniform (Gi) + Rashguard
- Monthly Progress Assessments
- Competition Training
- One Private Lesson Per Month
Family
Train together as a family with our comprehensive package.
- Access for 2 Adults + 2 Children
- Unlimited Access to All Classes
- Free Uniforms (Gi) for All Members
- Monthly Progress Assessments
- Competition Training
- Discounted Private Lessons
Other Options
What Our Students Say
Hear from our community about how training at our academy has impacted their lives.
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"My kid has been going to KIDS Ground Class since May. Coach Tom is a patient, fun, and a very good fit with my son. Randy Brown is just amazing. He is such a good role model for children. Always being respectful but firm. My son recently started attending their new KIDS Boxing class and it is one of my son’s favorite activities. The classes are small so the children receive excellent instruction. The facilities are clean and the staff is excellent. Cannot recommend enough. Feel truly lucky to have found Mantis Boxing."
Chris Barrett
"As an older student with no prior martial arts experience I was quite apprehensive about my first undertaking in martial arts. When I first contacted the school Master Brown spent quite a bit of time with me on the phone to understand my athletic background and goals. He clearly articulated his training philosophy and how he ran his school. In short he made feel much more at ease with taking that first step of showing up at the school and taking a class. Needless to say I enjoyed my first class and have not looked back. As a long time athlete who has been fortunate to have been coached by a number of top instructors in a variety of different athlete pursuits, I can recognize a good coach vs. an inferior one. Master Brown is a very gifted athlete who has been successful not only in several disciplines of martial arts, but who has completed at the very highest levels in other sports as well. He combines his athletic background with a solid understanding of exercise physiology and nutrition and is able to pass that knowledge onto his students. Master Brown is a dedicated teacher who goes to great lengths towards understanding different teaching mythologies and how best to apply them to the individual student whether that student is a teenager or septuagenarian. Master Brown’s efforts give each student the best chance of being successful in his or her chosen pursuit. Whether you have been on the fence about learning a martial art or you are already an accomplished martial artist Nor’easter Martial Arts is the school for you."
A P
"My two children have joined Randy’s class. My older 9YO does the Jiujitsu class and the Mantis Boxing class. My 5YO has joined the Jiujitsu class. Feel so lucky to have found this gym. Couple of things: 1. My kiddos love the instruction. Randy is an excellent teacher and LOVES what he does. 2. There are no time outs for the children. They are talked with like an adult, which is a big plus in my book. 3. Tom is an awesome coach. He and Randy create the perfect balance in a class with children. 4. The ratio of 4/1 teacher is something not found in regular children’s classes. My kids received individualized training and that is great because they have wiggly butts. 5. The atmosphere is that of respect and mutual collaboration towards your peers. 6. Piece of mind as a mother because my kids are in a safe environment. Keep doing the amazing job you are doing! And THANK YOU for teaching our kids not only this art but teaching them how to be kind, respectful, and good human beings."
Hannah Huynh
"I have only taken kickboxing classes here, but I absolutely love this little dojo. Randy really cares about his students and goes to great lengths to give each individual the attention and motivation they need to succeed. Randy, Holly, and all of the folks who come to classes are friendly, welcoming, and supportive - this is a really fun place to work your ass off and get into great shape without fear of judgement or ridicule. I started out a few months ago with no experience and no real athletic ability to speak of and have progressed faster than I ever thought possible!"
Contact Us
Have questions or ready to start your Jiu-Jitsu journey? Get in touch with us today!
Send Us a Message
Our Location
Address
192 E Main St, Westminster, MA 01473, USA
Phone
Hours
Mon-Fri: 6:00 AM - 9:00 PM
Sat: 9:00 AM - 2:00 PM
Sun: 10:00 AM - 12:00 PM