Dr. John Mullen          Chris Barber          Michael Vaandering          Jamil DeversFront Desk


Dr. John Mullen


Dr. John Mullen, DPT, CSCS is a World renowned expert and speaker in sports training and rehabilitation. He received his Doctorate in Physical Therapy at USC, as well as the Josette Antonelli Division Service Scholarship, Order of the Golden Cane, and the Order of Areté. At USC, he also performed research on swimming biomechanics and lung adaptations in swimming training. Dr. John has worked with multiple professional and Olympic athletes, helping them earn Olympic medals. His dedication to research and individualization spurred him to open COR in 2011. Since 2011, Dr. John has been featured in Gizmodo, Motherboard, Stack Magazine, Swimming World Magazine, Swimmer Magazine, USA Swimming, USA Triathlon, Swimming Science, and many more.  He has worked with the numerous colleges and teams regarding rehab and performance. Before his Doctoral program, Dr. John swam on an athletic scholarship at Purdue University. At Purdue, Dr. John was an Academic Honorable Mention All-American and was awarded the Red Mackey Award and R. O. Papenguh Award. He also won the Purdue Undergraduate business plan and elevator pitch competition, as well as 1st prize with the Indiana Soy Bean Alliance. Dr. John was born in Centerville, Ohio and was a 24-time high school All-American Swimmer. Dr. John is still a swimmer and holds a Masters swimming World and Pacific Swimming Record.

Chris Barber


Coach Chris Barber is a foremost expert in sports training, body composition enhancement, and application of biomechanics for performance. Chris is a Certified Personal Trainer with the National Council of Strength and Fitness (NCSF) and with United States of America WeightLifting (USAW).  He also is a ISSA Fitness Nutrition Specialist. Chris graduated with a B.S. at Concordia University in Irvine, CA.  He writes extensively on health, fitness, and sports, being featured in various sports magazines. Chris started as an Intern at COR in December of 2012 and has moved his way up to the Director of Personal Training and the Head Strength and Conditioning Coach at COR.  Chris has been devoted in help everyone strive to achieve their goals.  Through the past 3 years Chris has developed a Kids Athletic Development Program and High School Strength and Conditioning Camps.

Chris played baseball and football for most of life.  With a career ending injury, Chris has been committed in developing young athletes so they will not only become better athletes but most importantly stay healthy!

Michael Vaandering


Michael Vaandering graduated from the University of Michigan School of Kinesiology with a B.S. in Physical Education and a minor in Health Education. He is a Certified Personal Trainer with the American College of Sports Medicine (ACSM). Michael grew up on the west side of Michigan, where he competed on his high school’s water polo team as well as the swimming and diving team. As a springboard diver, he earned all-state and all-american status. During his junior and senior years, Michael used his experiences on the diving board to informally mentor the middle school diving team, including occasionally taking the role of interim coach. During his college career, he was a member of the University of Michigan Men’s Swimming and Diving Team where he helped his team toward NCAA and BIG 10 Championships. During that time he was also a coach for the local rock climbing team. He used these outlets to apply his knowledge of the underlying biomechanical principles involved in motor movement and performance to gain an edge over competitors and improve the strength and efficiency of his climbers. Michael has also been published in the International Journal of Case Studies as well as the Journal of School Health for his research into the connection between physical activity and cognition. As a supporter of lifelong sports and the many benefits that accompany them, Michael spends much of his time in such activities as tennis, squash, rock climbing, hiking, and swimming.



Jamil Devers is a Doctor of Physical Therapy student at the University of San Francisco/San Francisco State University. At UCSF/SFSU Jamil has performed and presented research on Myofascial Decompression Therapy for Chronic Hamstring Injuries as well as Psychological Interventions with PT for Athletes following ACL Reconstruction. Additionally, Jamil has participated in UCSF’s Run Safe Program that analyzes running biomechanics and has extracted and investigated research on running as it relates to common injuries, footwear and biomechanics. He was co-president of the Black Student Health Alliance at UCSF and frequently facilitated campus events such as the SNMA at UCSF Student for a Day Conference. Prior to physical therapy school, Jamil graduated Magna Cum Laude Honors with a B.S. in Allied Health Sciences and played 4 years on a full athletic scholarship for Howard University’s NCAA Division I Men’s Soccer team in Washington D.C. At Howard, Jamil was inducted into the Epsilon Tau Sigma Honors Society and the National Society of Collegiate Scholars. He also captained the Men’s Soccer team, was awarded Most Valuable Player during his senior year and was the Assistant Men’s Soccer Coach during the 2011-12 season. Through Jamil’s previous clinical experiences, research and experiences as a collegiate soccer player he has become extremely familiar with soccer and other sports related injuries.

Jamil was born Oakland, CA however he spent most of his childhood upbringing in several countries throughout the Caribbean that included Belize, Jamaica and Trinidad and Tobago. His sensitivity and appreciation of diversity can be accredited to his unique background and experiences derived from residing in several countries. Furthermore, Jamil has adopted a commitment to serving others through his experiences of working with at risk youth and to promoting initiatives that advocate for diversity and the inclusion of minority and underserved individuals throughout all health professions.

Front Desk

Cassandra Montez

Cassandra lives in the bay area  with her parents and two younger sisters. She is a first generation college student majoring in medical assisting and aspiring to become a cardiac nurse in the future. She has a passion for health care and have been a hospital volunteer for 3 years. In her spare time, she enjoys spending time with family and friends. She also enjoys crafting, gardening, hiking, and cooking.

m-bennett-headshot2190x143Margo Bennett

Margo is a bay area native and grew up in Cupertino. She is  married, has one daughter and a 10 year old grandson who live in Florida. As a teenager, she was overweight. The week she turned 18 she joined Weight Watchers and it changed her life. She strives to eat healthy and stay active every day since then. She enjoys spending time with my family, friends, walking my dog, spending time outdoors, all things involved with music, and dancing.

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