David Moon (Owner & Head Instructor)
David Moon is a 6th-degree black belt in Moorimdo and a direct student of Great Grandmaster Yong Moon, continuing a lineage built on decades of martial arts mastery. In addition to his Moorimdo background, David is also a 6th-degree black belt in Taekwondo, a black belt in Kung Fu, a 10th Planet Jiu Jitsu Purple Belt, and has trained in Kickboxing and Muay Thai throughout his life.
As Head Instructor and Operations Manager at MRG MMA, David leads the academy’s training programs with a clear standard: structure, discipline, and measurable progression. He is the architect of MRG’s Mixed Martial Arts Program, where he developed a systemized ranking and training structure that gives students clear direction and consistent growth. His philosophy is simple: students should never train without purpose. Every class is designed to build real skill, confidence, and accountability.
Over the course of his career, David has coached more than 1,000 students, ranging from complete beginners to competitive athletes. He is also the founder of the MRG Fight Team, where students actively compete in Muay Thai and Brazilian Jiu Jitsu, gaining real competition experience and producing proven results.
With over a decade of coaching experience across kids, teens, and adult programs, David has built a reputation for developing students who are not only technically skilled, but disciplined, focused, and consistent in their growth. His diverse training background allows him to develop well-rounded practitioners in both striking and grappling, blending traditional martial arts principles with modern combat sports training.
A Los Angeles native and UCLA graduate, David brings a performance-driven and detail-oriented approach to his instruction. Before dedicating himself fully to martial arts, he was a top-ranked junior golfer who competed internationally. As a PGA Associate, he continues to coach privately, applying the same precision and high standards that define his teaching.
What ultimately sets David apart is his ability to combine high standards with structured development. Students training under him don’t just attend classes—they develop real skill, measurable progress, and a mindset rooted in discipline and accountability.
Daniel Lee (Director & Cardio Kickboxing Coach)
Daniel H. Lee started his Moorimdo training at 4 years old and is a 6th degree black belt under Great Grandmaster Yong Moon. He has also trained and competed in various other martial art styles up to the collegiate level. He attended the University of California, Berkeley and graduated with a bachelor’s degree in Molecular Biology.
Daniel Lee is the President of DBM Corporation USA, where he oversees the company’s U.S. operations, sales, marketing, and growth strategy within the medical aesthetics and healthcare industries. With extensive experience in business leadership, sales, and operations, Daniel has helped organizations scale through strategic planning, team development, and process improvement.
In addition to leading DBM USA, Daniel is an entrepreneur and business consultant who works with companies on growth strategy and operational efficiency. His passion for leadership, discipline, and continuous improvement extends beyond the corporate world and into martial arts, where he enjoys helping students develop confidence, resilience, and lifelong skills both on and off the mat.
Nacho (Muay Thai & MMA Coach)
Nacho was born and raised in Spain, where he began his career as a Sanda fighter and earned a Bachelor's degree in Sports Science.
After securing three consecutive gold medals at the Spanish Wushu Championship, winning a bronze at the European Championship, and being recognized as a High-Level Athlete by Royal Decree, he relocated to Los Angeles. From there, he continued to expand his fighting career, gaining experience in Muay Thai, Kickboxing, and MMA. Additionally, he has trained renowned fighters from organizations such as the UFC, Bellator, Glory, and Karate Combat.
Jay Garber (Jiu Jitsu Coach)
Jeremiah "Jay" Garber is a black belt in 10th Planet Jiu Jitsu under Eddie Bravo, with a strong wrestling foundation. His martial arts journey began at an early age, as wrestling is more common and affordable for young boys in Iowa than daycare. This early exposure set the stage for his later ventures into Jiu Jitsu, Muay Thai, and Mixed Martial Arts.
In addition to his work with MRG, Jay is an instructor at 10th Planet Headquarters and 10th Planet Torrance. He also runs a program at The Yard. Jay is enthusiastic about developing the grappling program at MRG, where he brings his extensive experience and passion for grappling to a new audience.
After high school, Jay served six years in the Air Force, during which he began his Jiu Jitsu training. While stationed abroad, he developed and created martial arts programs at various duty stations. Academically, Jay holds an associate degree in Statistics and is nearing the completion of his Bachelor's in Psychology at Azusa Pacific University. He aspires to pursue an M.D. to become a psychiatrist.
Outside of martial arts, Jay enjoys reading, traveling, shooting, camping, and horseback riding.
Anton T. Bex (Muay Thai & MMA Coach)
With over 25 years of experience in martial arts and combat sports, Anton competed in MMA, Kudo, Kyokushin, Sanda, Muay Thai, Brazilian Jiu-Jitsu, and Kickboxing, earning several "Fight of the Night" awards in MMA. Notable accomplishments include being the 2025 Kudo World Champion, 2023 Kudo -260 Category North American Champion, the 2020 Kyokushin IKO U.S. 80kg Weight Category Champion, and the 2013 ICMAC Sanda 170lbs Champion. He also studied various other martial arts, including Jeet Kune Do, Baji Quan, Boxing, Fencing, Eskrima, Chun Kuk Do, and Kung Fu San Soo.
As a martial arts actor and stuntman, Anton appeared in Dragon Ball Z: Light of Hope, Snow White and the 7 Samurai, Prepare to Die, and Fast Vengeance. Additionally, he featured in several music videos for artists such as DaBaby, Jake Paul, and Reel Big Fish.
Justin Cruz (Moorimdo & MMA Assistant Coach)
Justin De La Cruz started training in Moorimdo at the age of 13, and currently holds a Third Degree Black Belt under David Moon. He is a brown belt in the MooriMMA Program. He began his martial arts training in Shito-Ryu Karate at the age of six and competed in his school days. Justin currently teaches the kids and teens classes at the academy.
Justin was born and raised in Los Angeles, California. He attended Star Christian School and Child Care Center, St Agnes Catholic School, Los Angeles Senior High School, and studied at California State University, Los Angeles, where he earned a bachelor's degree in communication as a first-generation graduate. When he isn't doing martial arts, he likes to hike, swim, and participate in guitar performances for foundations and concerts.
Brandon Soohoo (Ambassador)
Brandon Soohoo is a lifelong martial artist with a black belt in Tae Kwon Do and a diverse background in Karate, Boxing, Wushu, and Wing Chun. Currently, his favorite style is Muay Thai, of which he is an avid practitioner. An LA native with a passion for performance and creativity, Brandon has been professionally acting since the age of 10, showcasing his martial arts skills in numerous fight scenes and stunt performances in movies like "Tropic Thunder" and "G.I. Joe," as well as TV shows such as "From Dusk till Dawn." SooHoo also amassed a substantial following on social media, growing an audience of over 1.4 million followers online, where he creates comedic content centered around martial arts.
For Brandon, martial arts is more than just a physical practice; it is a lifestyle that unites mind, body, and spirit. He believes it is one of the pillars of his life, teaching him invaluable lessons that have shaped who he is today. When he is not training or on set, Brandon enjoys exploring his passions in cooking, filmmaking, travel, and various visual arts.
