Andrew Barr, DPT | PT | MSC | CSCS
Founder and CEO

Andy is the founder of Quantum Performance. A native of the UK, he started his career as a professional football (soccer) player with Luton Town F.C. but his career was cut short by injury. Driven by his passion to help other athletes avoid injury and maximize their performance potential, he studied a Physiotherapy degree. Andy holds a BSc in Physiotherapy, an MSc in Sports Science, and a Doctorate in Physical Therapy.

At Quantum Performance, he works with athletes and teams from the NBA, NFL, EPL, UEFA, MLS, PGA, and Olympics. Athletes travel to his high-performance facility in LA for off-season work, biomechanical testing, or for injury rehabilitation.

Dr. Ruben Gonzalez, PT, DPT
Director of Physical Therapy

Ruben graduated with his B.A. in Biology from the University of Redlands and then went on to receive his Doctorate in Physical Therapy from the University of St. Augustine for Health Sciences. During his time at the University of St. Augustine, Ruben under went extensive training in various manual therapy techniques. Ruben has also gone through extensive continuing education through EXOS, the Institute of Clinical Excellence, Owens Recovery Science and many others to continue to improve his expertise in the field of Sports Physical Therapy and Sports Performance.

At Quantum Performance, Ruben has worked with athletes from the NBA, WNBA, EPL, and NFL. As the Director of Physical Therapy, he helps organize and manage the care for all athletes that come through Quantum Performance. In addition to directing the plan of care for athletes he is also working as a consultant to NBA players, traveling to their respective markets, and helping them stay healthy throughout their season.

Dustin Willis, PT, DPT, OCS, TPS

Dustin graduated with his Bachelor of Science (BS) in Exercise and Sports Medicine with an emphasis in Human Performance from California Lutheran University. He then went on to receive his Doctor of Physical Therapy (DPT) from Loma Linda University & after graduating,completed the Orthopedic Residency Program. He then underwent more advanced training by completing Kaiser Permanente Southern California's Sports and Manual Therapy Fellowship, the Lower Extremity Biomechanics Fellowship at the Movement Performance Institute, & Azusa Pacific University's Movement Performance Fellowship. All of this led to him becoming distinguished as an Orthopedic Clinical Special ist (OCS), a Fellow of t he American Academy of Orthopedic Manual Physical Therapists (FAAOMPT), as well as a Therapeutic Pain Specialist (TPS). Dustin is currently working on becoming a Certified Applied Functional Science Specialist (CAFS) through the Gray Institute, an EXOS Performance Specialist, & finishing up his PhD in Rehabilitation Sciences back at Loma Linda University.

Alan Hsieh, MS, CSCS, CES , MSOL

Alan Hsieh is a specialist in the field of sports performance and injury risk reduction. He ha s a diverse experience that has improved the athletic performance of a variety of highly competitive professional sports organizations and individual athletes from the NBA, UFC, CBA, CPBL. He is the founder of Science of Performance, LLC (sop4pro.com ) with the mission to bridge the gap between English and Chinese-speaking professional athletes . Recently, held the role of Director of Strength & Conditioning at Chinatrust Brothers Baseball Club, his application of evidence-driven science and cutting-edge technology has helped the team change their approach to training . Currently, he is based in China with a CBA team for performance rehabilitation . His full education background includes a Bachelor of Science, Exercise Science and Sport Studies from Rutgers University and a Master of Science in Exercise Physiology from William Paterson University. He continues his education by pursuing a Master of Science in Organizational Leadership, through the University of Colorado Boulder.

Dr. Kristina Kam, PT, DPT, XPS

Kristina brings a unique approach to the team as her own journey has provided a panoramic understanding of what the road to rehabilitation and human performance entails from first hand experience. A native of Honolulu Hawaii, Kristina graduated from the University of Hawaii with a B.A. in Biology where she also played D1 indoor & beach volleyball. She then went on to receive her Doctorate of Physical Therapy at West Coast University.

Kristina’s path to pursuing physiotherapy stemmed from undergoing five reconstructive surgeries during her athletic career. Her current focus is highlighted through trifecta aspirations, where she is passionate about strength & conditioning, being a consultant for indoor and beach volleyball players, and curating individualized plans to those in need of physiotherapy.

Committed to being a life long learner, Kristina highly values mentorship, which has allowed her to gain a skillset and knowledge base that is constantly being refined and influenced by some of the best in the industry. Her life’s work will be dedicated towards instilling a spirit of relentlessness to those who are in the face of adversity. She hopes to provide encouragement in aspects of health & wellness and human performance in addition to helping others discover and become the best versions of themselves through embracing this journey that life has imparted on us.

Raj has a his passion for managing elite athletes’ injuries and optimizing performance, through a holistic lens.

Raj’s love for systems and problem solving originally led him to an undergraduate business & social welfare double major at UC Berkeley and after working for Fortune 100 companies, his passion for sports navigated him into physiotherapy, receiving his doctorate from Northern Arizona University in 2017, with ongoing coursework in sports science, biomechanics/movement science, sports psychology and at UCLA’s mindful awareness research center (MARC) to better understand the relationship between the brain & body for health & performance.

In addition to Quantum, he’s built out sports injury & performance brand 3CB Performance, been featured & written for multiple high profile outlets including The Athletic and Well + Good, is a health consultant for an NBA agency, and the sports health/fitness director for youth training facility Ekata. 

His experience includes working with elite athletes from the NBA, MMA, Premier League, La Liga, NHL, Olympic volleyball, ATP tour, professional dance, running (including sprinters, triathletes, and ultra marathons) to youth athletes ranging from middle school to D1. His goal is to get you healthy, keep you healthy, and unlock performance.

Dr. Rajpal Brar, DPT, CSCS