About US

Matadero Whittier
a Martial Arts School

We help cultivate strength, discipline, and confidence through dynamic arts listed below. Located in a vibrant community, Matadero Brea offers a comprehensive range of classes for both kids and adults, ensuring a supportive and engaging environment for all skill levels.

We Offer: Kids and Adults JiuJitsu, Kickboxing/MMA
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Classes Programs

What we Offer

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Kids Jiu-Jitsu

In the kids Jiu-Jitsu Group program, students learn the fundamentals of Jiu-Jitsu, including basic positions, escapes, and submissions. They also progress to advanced techniques such as joint locks, sweeps, and grappling. Beyond the physical skills, students are taught important life skills like respect, focus, and perseverance.

5:00 - 6:00
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Adult Jiu-Jitsu

Our Adult BJJ Program is designed to teach the fundamentals and advanced techniques of Brazilian Jiu-Jitsu in a supportive and challenging environment. Participants will develop physical fitness, self-defense skills, and mental discipline. Whether you're a beginner or an experienced practitioner, our program offers personalized instruction to help you achieve your goals, improve your technique, and build confidence both on and off the mat. Join us to enhance your physical and mental well-being through the art of Brazilian Jiu-Jitsu

6:00 - 7:30
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Adult Kickboxing/MMA

Our Adults MMA and Kickboxing classes at Matadero provide high-intensity training to enhance your striking, grappling, and overall fitness, suitable for all skill levels in a dynamic and supportive environment.

6:00 - 7:30
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The People behind Matadero Brea

Matadero Team

Meet the Matadero Team, a group of dedicated and experienced martial arts professionals committed to guiding you on your journey in Brazilian Jiu-Jitsu and MMA/Kickboxing. Our instructors bring a wealth of knowledge, passion, and personalized training to help you achieve your fitness and martial arts goals. Join us and become part of our supportive and empowering community.

Kristofer Udan
Head Instructor & Co-Owner

Kristofer Udan, a dedicated martial artist since 2008, brings extensive experience in Brazilian Jiu-Jitsu, Kickboxing, and MMA to Matadero Whittier. As a former MMA fighter and First Aid/CPR certified instructor, he ensures the highest standards of safety and care for his students. Join Kristofer's classes and benefit from his passion for teaching and comprehensive martial arts knowledge.

Omar Gastelum Esq.
Kids Instructor & Co-Owner

Omar Gastelum, a seasoned attorney and passionate martial artist, is a proud co-owner of Matadero Jiu-Jitsu - Whittier Martial Arts School. His journey in Brazilian Jiu-Jitsu began in the mid-90s under the renowned Rodrigo Medeiros in Whittier, and he returned to the mat in 2019 to train under Fredrick Gumm, achieving the rank of blue belt. Omar's unique blend of legal expertise for 20+ years, business acumen, and martial arts passion plays a crucial role in the development and success of Matadero. He is dedicated to fostering a supportive and empowering environment for all students, ensuring Matadero Martial Arts School is a place where individuals can thrive both physically and mentally.

Cyndee Mendoza
Kids Instructor

A kids coach at Matadero Jiu Jitsu in Whittier. I’ve been training Jiu Jitsu for over five years and am proud to have earned my purple belt. I’ve been volunteering with the kid’s class for about three years and recently stepped into my role as a kids coach.
Working with the kids is where my heart is. My biggest goal is to get to know each student individually and meet them where they are. I’m naturally very empathetic and I understand that Jiu Jitsu can be hard because I know, it’s hard! I love helping students work through those moments, encouraging them when they’re struggling and celebrating them when something finally clicks.
There’s nothing like seeing that look on a kid’s face when their little brain suddenly gets it. Those moments become memories forever and getting to be part of them is one of my favorite things about coaching.
Jiu Jitsu has become a huge part of my life, my whole family trains together. Outside of the mats, I’m an artist at heart and love anything creative, music, skating and being outdoors. I’m also known for my playlist, which tend to get a few compliments!
I’m grateful to be part of the Matadero community and to help create a place where students feel supported, challenged, celebrated, and excited to keep learning.

Brianna Godinez
Kids Instructor

Brianna Godinez is a dedicated kids instructor with 8+ years of experience in Brazilian Jiu-Jitsu under her belt. She values maintaining a safe and comfortable environment, enabling her students to grow within the art while also having some fun. When training on the mat, she looks forward to empowering women and showcasing how strong a woman can be



Family is everything to us!
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Our family-run martial arts school where we unite to train, grow, and thrive together. Passionate about Brazilian Jiu-Jitsu, we are dedicated to helping families bond and build stronger connections through fitness and shared goals. Join us as we foster a healthier and more connected community through the art of Jiu-Jitsu.
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How We Work / FAQ

Whether you're curious about our class offerings, enrollment process, or safety protocols, find the answers you need right here. If you have any further questions, feel free to contact us directly—we're here to help you embark on your martial arts journey with confidence and clarity.

Do I need previous martial arts experience to join?
What Age Group are the classes?
What safety measures are in place?