Meet our Team


John A. Davis, NBC-HIS

John Davis is the Founder and Chief Operating Officer (CEO) of Davis Health Inc. He has over 43 years of experience and education in hearing healthcare, fitting thousands of patients. Shortly after joining the United States Military in 1977, John began training at the Ear, Nose and Throat Audiology Clinic in Brooke Army Medical Center in San Antonio, Texas. He later served in Reynold’s Army Hospital in Fort Sill, Oklahoma, where he dispensed hearing aids to the troops. After leaving the Military, he continued his education with the American Conference of Audioprosthology, where he studied hearing sciences and become a certified Audioprosthologist. During his studies, he started his first private practice to serve local military dependents. John has owned over 20 hearing aid offices throughout Florida and Tennessee since 1981. John is licensed specialist and a member of both the International Hearing Society and Tennessee Hearing Society. He currently owns offices in East Tennessee known as Advanced Hearing Healthcare.


Tiffany Head Birchfield

Tiffany was trained at the Starkey Center for excellence to provide concierge-level care. She highly values ensuring our patients get the utmost level of attention. She also has experience with many hearing devices and is dedicated to servicing your needs. Tiffany looks forward to growing with the Advanced Hearing team! In her free time, she enjoys spending time with her family and baking. 


Saghel Reddy

Saghel joined Davis Health in 2020 as Operations Manager for the Advanced Hearing Healthcare offices. Prior to joining Davis Health, she served as the Practice Manager for The Steadman Clinic at Vail Health Hospital in Colorado. Saghel also served 10 years at Walgreens Pharmacy in a variety of administrative and clinical roles. She obtained her bachelor of science in Chemistry from East Tennessee State University, Johnson City, TN; her Masters in Healthcare Administration from Trevecca Nazarene University in Nashville, Tennessee. She also studied at Wingate University College of Pharmacy in North Carolina from 2011-2014. 



John B. Davis, BC-HIS is Nationally Board Certified in Hearing Instrument Sciences. He has over 23 years of experience in the field of hearing loss treatment, and tinnitus management, including 14 years as a factory representative for a major hearing aid manufacturer.

John opened Sound Advice Hearing Center in June of 2011. He has helped thousands of York and Mecklenburg County residents regain their quality of life through better hearing. He is a member of the River Hills/Lake Wylie Lions Club and serves on the hearing committee. John and his Dad enjoy challenging each other on the latest Technologies, across state lines.


Mary Winslow, MSW., LCSW

Mary Winslow is a Licensed Clinical Social Worker trained in psychotherapy who helps individuals deal with a variety of mental health problems that affect quality of life. Hearing issues may create individual and relationship problems. Safety and emotional concerns can be addressed to improve overall well-being of patients and families. It helps to talk.