We are proud of our dedicated and caring dental team, each of whom was carefully selected to provide exceptional care for our patients at every stage of treatment, from routine hygiene visits to the most complex procedures. Our team shares the same values of continued educational development and dental industry advancements to provide the best dental care possible. They strive to maintain the feeling of friendship and family that has always been a hallmark of our practice.
Walker & Barr, DMD History. A Dental Clinic in Brandon, FL.
The practice was established by Dr. Marlin D. Walker in 1965. Dr. Marlin Walker graduated from Emory University College of Dentistry before serving in the Air Force for two years. When he began practicing dentistry, he was honored to become only the second full-time dentist in the entire Brandon area. Dr. Marlin Walker retired in 1998 after serving the community for 33 years.
When Dr. Marlin Walker retired, Dr. David Walker’s friend and dental school classmate, Dr. Eric Raynal, brought his skills and personal touch to our practice for 23 years before retiring in 2019.
Dr. Sarah Barr joined the practice upon Dr. Raynal’s retirement. She and Dr. David Walker intend to continue the practice’s traditions of quality dental care and feeling of family.
Our entire team looks forward to serving the Brandon community as your trusted dental provider for many years to come. We hope you enjoy learning a little more about us!

Dr. Sarah Barr
In keeping with the tradition of our practice, Dr. Sarah Barr has deep local roots—she is a Tampa native who grew up in the Apollo Beach and Brandon area and is a graduate of the Academy of the Holy Names High School in Tampa. She grew up as a third-generation patient of our practice and worked for us as a dental assistant before attending graduate school.
Dr. Barr achieved her Doctorate in Dental Medicine from Tufts University in Boston, Massachusetts, after earning a Master’s degree in Medical Science from the University of South Florida and an undergraduate degree in Exercise Science from Florida State University. She is also an active member of the Florida Dental Association and the American Dental Association.
In her free time, Dr. Barr enjoys all Tampa area sports teams and loves spending time on the water with family and friends. She is also a member of the Junior League of Tampa and finds joy in giving back to her community.
See Complete Bio
Dr. Donna Mansour
Dr. Donna Mansour is a Florida native who grew up in Sarasota, FL. She attended the University of South Florida in Tampa, where she completed her undergraduate degree with a double major in Biomedical Sciences and Sociology.
She continued her education up north, earning her DDS degree from New York University College of Dentistry. Afterward, Dr. Mansour furthered her education by completing a one-year general practice residency at a level one trauma hospital in Brooklyn—NYU Langone (previously Lutheran) Hospital.
Dr. Mansour was delighted to move back to her home sunshine state following her training. In her spare time, she enjoys spending quality time with friends and family and staying active in her church community. She's a big fan of traveling, comedy shows, and always supporting our local hockey team, The Tampa Bay Lightning!
See Complete Bio
Allison
Dental Hygienist

Janis
Dental Hygienist

Kimmy
Dental Hygienist

Tina
Dental Assistant

Jennifer
Dental Assistant
Catelynn
Dental Assistant
Penny
Patient Services Coordinator
Brie
Patient Services Coordinator

Cissy
Business Administrator
Sadly, I have not been to the dentist in a very long time because my teeth have always been really good. However, I found a cavity that felt huge. Dr Barr did an excellent job repairing it with Tina, her dental assistant. While checking my teeth another cavity was found and I will have Dr Barr and Tina repair that too in a few weeks. I will be visiting them twice a year for cleaning and maintenance. Dr Barr and team are extremely professional and I would happily recommend them.