Our Doctors

Dr. Jennifer Vaughn, DC

Dr. Vaughn has been in active practice in the state of Florida since 2003. She graduated Cum Laude from Texas A&M University at Galveston with a B.S. degree in Marine Biology in 1995. She also holds a second B.S. degree in Human Anatomy and graduated Magna Cum Laude and Salutatorian from Parker College of Chiropractic in 2002.

  • Full Bio

    Dr. Vaughn is a member of the Florida Chiropractic Association and is an adjunct professor at Palmer Chiropractic College in Port Orange, FL. She has been a certified Erchonia Cold Laser practitioner for almost a decade. Dr. Vaughn is also a certified Graston practitioner. She has been using instrument adjusting techniques for more than fourteen years to treat patients ranging from newborns to ninety two year olds. She has treated professional football players, professional golfers, professional dancers, professional tennis players and professional basketball players. She has a huge passion for identifying and correcting structural problems that come from scar tissue, poor posture, and improper ergonomics. In her practice she has always looked at the function of her patients as a whole and she strives to correct not only the structural component, but the lifestyle, nutritional, detox and stress components of health.

    Dr. Vaughn was blessed to work for almost six years with the world famous Dr. Don Colbert MD. Dr Colbert is a New York Times best selling author and has helped tens of thousands of patients to regain their health. In her time there she worked with an enormous variety of patients, from healthy to very ill. She is eternally grateful to Dr. Colbert for his tutelage and his continued ministry using integrative medicine to heal patients. She is also grateful for the training she received under Dr. John Brimhall DC while she was still in school and in early practice. These two physicians have helped her to become the doctor she is today.

    Dr. Vaughn comes from a family that is very medical. Her grandfather was an MD surgeon, her uncle was an MD in family practice and her first cousin is an MD endocrinologist. Her husband is a sales representative for a large medical supply company. She believes that medical specialists can and should work together to create comprehensive health care for every patient. It is her goal to help each patient create their own unique flowchart of health and to give them the tools they need to heal.

Dr. Dana O’Keefe, DC, CCSP®

Dr. Dana O'Keefe, DC, CCSP®• Chiropractic & Functional Medicine Physicians 
Owner/Chiropractic & Functional Medicine Physician
• Brain Health Orlando
Owner/Neurofeedback Program Director

Dr. O’Keefe graduated Cum Laude from Palmer College of Chiropractic Florida Campus with her degree as a Chiropractic Physician, and with honors from University of Phoenix with a B.S. degree in Business Management. She has also obtained the postgraduate designation of
Certified Chiropractic Sports Physician® (CCSP®) by the American Chiropractic Board of Sports Physicians™. This certification is specific to physical fitness and the evaluation and treatment of injuries encountered in sports. She has extensive training as a Functional
Medicine Physician and is currently working on her Diplomate in Internal Medicine (DABCI) from the American Board of Chiropractic Internists.

  • Full Bio

    As a Functional Medicine Physician, Dr. O’Keefe’s passion is to help people regain and maintain their health. She is trained in, and prescribes, advanced lab work to support her evaluation and  determination of the underlying cause of various health issues. Through the use of appropriate diet, nutrition, lifestyle modifications, and exercise, she guides her patients in their journey towards abundant health.

    As a Chiropractic Physician, Dr. O’Keefe uses a variety of techniques including: Instrument Adjusting, Myofascial Release, Flexion-Distraction, and Activator techniques. She is a member of the Florida Chiropractic Association and holds additional certifications in Class IV K-Laser therapy, Graston adhesion release technique, Kinesiology sports taping, as well as TPI and Postural Rehabilitation for athletes.

    Dr. O’Keefe recently expanded the services offered at ChiroFunction and became the program director for Brain Health Orlando. Her history of multiple concussions and the lingering effects of her own brain trauma was the impetus that urged her to pursue the necessary training to implement Brainmapping and a Neurofeedback program. Neurofeedback is a non-invasive brain training technique that helps restore irregular brain wave patterns and has been used successfully to treat those struggling with ADHD, concussive and post concussive syndrome, anxiety, depression, memory issues, insomnia, migraines, and chronic pain.

    Prior to her doctoral studies, Dr. O’Keefe enjoyed an extensive career within the dance community as a choreographer and dance instructor. This background gives her a unique perspective when assessing injuries, postural insufficiencies, and kinetic chain dysfunctions. Her past career experiences, coupled with substantial education in anatomy, physiology, and nutrition have strongly influenced her resolve to help her patients remain active and healthy.


Dr. Sandra Buffkin, DC

Kelli Dorrough, RCA, CPT, CPEP

Kelli has been with ChiroFunction since 2014. She is a Registered Chiropractic Assistant (RCA), Certified Personal Trainer Rehab Fitness Specialist (CPT), and a Certified Posture Exercise Professional (CPEP). Originally from Miami, Kelli graduated from Florida International University with a degree in Education and a minor in Childhood Psychology. Kelli has always been fascinated by the brain and how it works; consequently, her interest in Neurofeedback and brain training has been a natural progression for her and her career in healthcare. She is passionate about helping patients achieve positive changes in their health and well being. Kelli loves dogs and salsa dancing and is always happy to go to a Miami Dolphins football game.

Ian Christianson

Ian Christianson

Ian has been a part of the ChiroFunction team since 2017. He graduated in the class of 2013 from Georgetown University and played professional soccer for 3 years in New York and Vancouver before finding his way to the Orlando area. He became part of our team through one of our patients and has become knowledgable in how healthcare is being transformed. He also appreciates the details behind the scenes that keep the practice running smoothly. Ian enjoys working out, listening to music, and appreciates a nice dog anywhere he goes.

Jillian Dominguez

Jillian DominguezJillian has been one of our office assistants since 2017, and is currently studying Health Sciences & Biology at the University of Central Florida. Her passion for healthcare began after entering the practice as a patient, and she is excited to be what Dr. Vaughn calls a “doc in progress”. Jillian is excited about her education in the healthcare field and appreciates the opportunity to learn from the physicians in our office. During her time at ChiroFunction, she has earned her certification as a K-Laser technician and enjoys working with each patient. Wherever her future in healthcare takes her, she will always consider herself a member of the ChiroFunction team and plans to revolutionize healthcare alongside Drs. Vaughn and O’Keefe.


If you are interested in our other services, please visit our website at www.chirofunction.com.

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