Gill's Fitness clients have an entire team of expert trainers to provide superior results.

Our clients are not assigned to just one trainer.  Having an expert team working toward your goals provides more variety for exercises, more options for scheduling appointment times, and keeps the workouts and conversations fun, new and interesting!  


Jonathan Gill - Director and Program Designer


Jonathan Gill, founder of Gill’s Fitness, was born in 1972 in Oakland, California.  Early in his life an obsession with fitness and athleticism grew in tandem with his dedication to soccer and martial arts and by 1988 while still in high school Jonathan was strength training daily and a diligent student of anatomy and biomechanics, applying what he learned not just to workouts for himself but also for friends and fellow athletes.

In 1990, Jonathan moved to San Diego to attend San Diego State University while continuing the development of his own strength training methodology.  One year later, in 1991 while still attending SDSU, Jonathan began providing personal training services in San Diego applying his unique approach with his first clients coming from those asking him for assistance and advice when seeing him working out in local gyms.  

In 1992, Jonathan was recruited by a large gym chain’s personal training division and spent the next year teaching his methodology to trainers and clients throughout San Diego county all the while continuing to build his own clientele and pursue his goal of creating the safest, most effective system of strength training ever designed.

By 1995 the popularity of Jonathan’s personal training services had grown such that he decided to open a private gym from where he could conduct his personal training programs, and hire and train trainers to serve his growing clientele.  In 1997, writers from various news outlets in San Diego heard of the success of the many clients now enjoying the rewards of Jonathan’s programs.  During the next few years Gill’s Fitness would appear 14 times in San Diego publications featuring dozens of success stories ranging from adults recovering from histories of injuries or disabilities to grandparents and retirees looking to better enjoy grandchildren and their golf games.  

In 2020 Jonathan celebrates 28 years training with one of his founding members and more than 20 years with 14 others, with dozens more not far behind.  Gill’s Fitness remains one of San Diego’s most successful and well established personal training businesses with an unmatched track record and more than a hundred testimonials proudly and confidently recommending it as one of the best decisions a person can make to improve quality of life.

Robert Fine - Trainer, Program Designer

Robert grew up in Crest and graduated from SDSU with a degree in Kinesiology.  He started his career with Gill's Fitness in 2004, while he was still a student.  Enthusiastic and passionate about the clients' health, Robert will encourage you to push yourself past your comfort zone to reach your goals, and keep you laughing at the same time!  Robert is an avid runner, surfer, snowboarder and can generally be found participating in a sunny outdoor activity when he isn't getting a workout for himself.

Ryan Hughes - Trainer

Ryan was born and raised in El Cajon.  He attended Cal State University Monterey Bay where he graduated with a degree in Kinesiology in 2014.  He began his career at Gill's Fitness during the summer of 2014.  Ryan has a background in athletic strength and conditioning and applies his skills using the Gill's Fitness style of hands-on training.  In addition to his weekly resistance training, Ryan also enjoys playing tennis, golf, scuba diving and generally anything outdoors!

Camilo Castillo - Trainer

Camilo moved to San Diego from Florida when he was a young boy.  He is an ACE certified personal trainer and is earning his degree for Kinesiology at San Diego State University.  He is passionate about human movement and continues to further his knowledge in biomechanics.  His experience with Gill's Fitness has developed him to be a better trainer for the clients and a better athlete for himself.  he is passionate about making the most of every session with clients.  He enjoys surfing, acrobatics, and living in San Diego!

Tyler Smith - Trainer


Tyler was born and raised in Berkshires County, Massachusetts. After obtaining a degree in Culinary Arts at Johnson and Wales University in Rhode Island, he made the decision to move to sunny San Diego.  Tyler is a NASM certified personal trainer and is dedicated to living a healthy, active lifestyle.  Being an Eagle Scout, he is always ready and willing to assist others.  With his extremely upbeat personality, he enthusiastically motivates clients to reach their full physical capabilities and training goals.

Connor Legore - Trainer

Connor was born in Thousand Oaks.  He came to San Diego in 2016 to attended SDSU, where he graduated with a degree in Kinesiology in 2018.  Connor has a passion for physical fitness and helping clients reach their full potential, as well as their personal goals.  He has taken the skills he has learned at Gill’s Fitness and incorporated them into his own life, which has helped him improve his own physical abilities.  On his days off, Connor can be found at the beach, or participating in outdoor activities that range from golf to hiking.