Meet Our Staff at Brain Balance of Wayne

Teresa Fuller, Md, PhD

Executive Director

Dr. Teresa Fuller is an author, speaker, and integrative holistic pediatrician who earned both her M.D. and Ph.D. from Howard University. With over 20 years of experience practicing pediatrics in the Maryland area, Dr. Fuller began her career in traditional medicine before shifting her focus to a holistic approach. Her passion lies in helping families achieve lasting health improvements through nutrition, lifestyle changes, and empowering them to take control of their well-being.

She currently serves as the executive director of the Brain Balance Centers in Wayne, PA, where she leads a team dedicated to delivering multimodal therapies designed to enhance attention, behavior, and emotional health in both children and adults.

Dr. Fuller is committed to educating and equipping families with the tools they need for lifelong wellness. Her work has been featured in The Baltimore Times, Demand Media, KevinMD, and Best Holistic Health Magazine. She has also made appearances on several local news outlets and podcasts. She is the author of Change 1 Thing: A Doctor's Plan for Permanent Weight Loss, Disease Prevention, and Incredible Health.

Dr. Fuller has been married to Julian Fuller for over 30 years. Together, they have two sons, a daughter-in-law, and two grandchildren.

Dr. Timothy Gray, MOL, D.B.A.

Center Director

Timothy Gray is passionate about helping individuals develop the tools and skills needed to become the best version of themselves. With more than 20 years of experience in the nonprofit sector, he has worked extensively with youth and students as well as in administrative and business roles.

Timothy holds a B.A. in Corporate Communications from Penn State University, an M.A. in Organizational Leadership from Regent University, and a Doctorate in Business Administration from George Fox University.

Outside of his professional work, Timothy enjoys rock climbing, staying active, reading, and working with leather. He believes in the power of consistent effort—commit to the process and you will see and feel results.

Tish Mitrentsis

Program Director

Tish Mitrentsis joins Brain Balance as Program Director, bringing a strong background in health, wellness, and child development. She holds a Master’s degree in Sports Business Management, a Bachelor’s degree in Healthcare Management, and certifications in Personal Training and Nutrition.

Passionate about helping children reach their full potential, Tish is committed to creating a supportive and encouraging environment where every child can thrive. She believes meaningful progress comes through collaboration and works closely with parents and caregivers to help children build the confidence, skills, and resilience needed for success both inside and outside the program.

Tish was drawn to Brain Balance because of its whole-child approach—one that closely aligns with her belief that lasting growth happens when children are supported physically, emotionally, and developmentally as a whole.

Her professional background includes Social Impact Consulting, personal training, and wellness coaching, all of which contribute to her well-rounded and compassionate approach to working with families.

Outside of Brain Balance, Tish enjoys cooking, hiking, reading, and traveling.

Alexia Flores

Family Resource Manager

With a B.A. in Psychology from Temple University, Alexia has always had a strong interest in psychology and neuroscience. Paired with the fact that she has always loved working with children, her path led her to become a Brain Balance coach!

Additionally, she has seven years of hands-on experience supporting children through ABA therapy, swim instruction, and childcare, aiding in her ability to work with child development.

When she’s not at Brain Balance, you can find her teaching Solidcore classes—showcasing her values in having a strong mind and body. She also loves trying new foods and restaurants, listening to podcast, and challenging herself with daily NYT games.

Her advice to families? “Be patient and consistent. Real growth takes time, and every small step your child takes is an achievement. Celebrate the victories, trust the process, and remember that your involvement and encouragement at home make a huge difference in helping your child succeed.”