The Doctors

GMS 20RobDr. Robert Gregory, D.C.

Doctor of Chiropractic

Dr. Rob is originally from Galesburg, a small town in Michigan but considers Guam his home. Not only does Dr. Rob bring his knowledge, skill and love of Chiropractic but he also brings his experience and dedication to the sport of Soccer. He has been coaching for over 25 years, and has played College Division I and semi- professional Soccer. With their arrival on Guam, both Dr.Rob and Dr. Barbara have volunteered countless hours of their time and service to the soccer community and other civic organizations.



GMS 20BarbDr. Barbara Gregory, D.C.

Doctor of Chiropractic

I am very passionate about educating people on how chiropractic can help them feel good and improve their quality of life. My life was changed by chiropractic in so many ways. In my teens I was in an auto accident that totaled the car. After experiencing years of back pain, neck pain, and brain fog, I started to become depressed. Pain can do that to you. The pain was not going away, and sometimes the pain was so bad I would drop to the ground, and have to crawl. I thought this was how the rest of my life was going to be.

Coming from a very medically orientated background, with many doctors and nurses in the family, I went the medical route first. That was all I knew. I saw a neurologist, tried different medications, and therapies. Nothing seemed to help. Fortunately, I was introduced to chiropractic, was analyzed and adjusted and given a care plan. After the first adjustment, I finally felt some relief, some hope. It wasn't all gone but just a little better. Its amazing how hope can change someone's perspective. The Chiropractic adjustments changed my life. Not only did the adjustments help with the pain and brain fog, it also helped me with the ear infections, bladder infections, and allergies that I had struggled with all my life.

My passion is to educate people on how Chiropractic Care can help them get better, feel good, and improve their quality of Life.

Chiropractic changed my life and can change yours!

I was born in the Philippines and raised on Guam, am the daughter of John “Eddie”, a chamorro native, and Olivia Rivera Onedera. I am the eldest of five children, all of whom have earned college degrees and returned to give back to the community of Guam.

The Gregorys have four children, Bryan Jordan, Sierra, and Chloe. Bryan, who is married to Jean, have blessed the doctors with their first grandchild, Alex. All are under Chiropractic Care.

Together, with a vision of improving the quality of life of the people of Guam, Drs. Rob and Barbara opened a small Chiropractic center in Tamuning and started serving the island of Guam. Through the years, their practice has grown by referrals from happy patients. It is a privilege to be able to serve, to love, and to give to different generations of Guam. In addition to the doctors, the team includes chiropractic assistants, who are also highly trained in the philosophy, science and the art of chiropractic.


Our Doctors are dedicated to providing great service and the highest quality of care. They complete an exceptional chiropractic team. Meet the Team.