Doctors
![Deidra Rondeno, DDS](https://dddfoundation.org/wp-content/uploads/2021/11/Dr-Ron-Edited-1.jpg)
Deidra Rondeno, DDS
Founder and CEODeidra Rondeno, DDS, graduated from Meharry Medical College School of Dentistry in 1996. She completed a General Practice Residency at Illinois Masonic Medical Center in 1997, one of the few programs in the U.S. that offers specific training in the treatment of patients having developmental disabilities. Dr. Rondeno is a member of the American Dental Association, The Academy of General Dentistry, the Georgia Dental Association, the Hinman Dental Society, the Northern District Dental Society, American Academy of Developmental Medicine & Dentistry, the International College of Dentists, and the Georgia Dental Society. Dr. Rondeno has been CEO since 1999.
![Karen Tartt-Callier, DDS](https://dddfoundation.org/wp-content/uploads/2021/11/Dr-Callier-Edited-1.jpg)
Karen Tartt-Callier, DDS
DoctorKaren Tartt-Callier, DDS, graduated from Meharry Medical College School of Dentistry in 1996. Dr. Callier is a member of the American Dental Association, Georgia Dental Association, Hinman Dental Society, and Northern District Dental Society. Dr. Callier has been with the DDD Foundation since 2017.
Dental staff
![Khadija Abdelmalek](https://dddfoundation.org/wp-content/uploads/2018/11/DDD-11.jpg)
Khadija Abdelmalek
Expanded Duty Dental AssistantKhadija Abdelmalek is a Expanded Duty Dental Assistant. She grew up in Morocco. She attended Metropolitan Institute of Health in Virginia, where she graduated in 2012. Khadija has been with the DDD Foundation since 2018.
![Darnell Hurt](https://dddfoundation.org/wp-content/uploads/2018/11/Darnell-Hurt.jpg)
Darnell Hurt
Expanded Duty Dental Assistant and Oral Surgery CoordinatorDarnell Hurt is an Expanded Duty Dental Assistant. Darnell is from Grand Rapids, Michigan. He attended Fortis College and graduated in 2014. Darnell is married and has two daughters. He has been with the DDD Foundation since 2013.
![Shawnda Hayes](https://dddfoundation.org/wp-content/uploads/2021/11/Shawnda-edited-1.jpg)
Shawnda Hayes
Clinical Supervisor/ Expanded Duty Dental Assistant/DANB Certified Dental AssistantShawnda Hayes is an Expanded Duty Dental Assistant and is our Clinical Supervisor. Shawnda is a native of Buffalo, NY. She attended the Educational Opportunity Center at the University of Buffalo, where she graduated in 2008. She has been with the DDD Foundation since 2014. In 2024 she passed the Dental Assisting National Board (DANB) examination, to become a Certified Dental Assistant.
Office staff
![Tiffany White](https://dddfoundation.org/wp-content/uploads/2021/11/Tiffany-edited-3.jpg)
Tiffany White
Director of OperationsTiffany White is our Director of Operations. She received her Master's degree in Healthcare Administration from Clayton State University. She is a member of DOMA (Dental Office Manager’s Association). Tiffany is a native of Newnan, Georgia, and has been with the DDD Foundation since 2009.
![Cassandra Dallas](https://dddfoundation.org/wp-content/uploads/2021/11/Cassandra-edited.jpg)
Cassandra Dallas
Sedation Supervisor, LPNCassandra Dallas is our Sedation Supervisor, LPN. She graduated from Central Georgia Technical College in 1996. A native of Macon, Cassandra has lived in Atlanta since 1998 and has been with the DDD Foundation since 2014.
![Lilian Cedano](https://dddfoundation.org/wp-content/uploads/2021/11/Lilian-edited.jpg)
Lilian Cedano
Front Desk CoordinatorLilian Cedano is our Front Desk Coordinator. She received her training as a medical administrative assistant from Everest Institute. Lilian is originally from the Dominican Republic. She has been with the DDD Foundation since 2012.
![Johnnae' Wright](https://dddfoundation.org/wp-content/uploads/2024/06/Johnnae-head-shot-close-up-1.jpg)
Johnnae' Wright
Billing CoordinatorJohnnae' Wright is our Billing Coordinator. Johnnae’ grew up in Atlanta. She attended Central Georgia Technical School and UEI College where she received training in Medical Billing and Insurance Coordination, and in Medical Assisting. She loves all kinds of writing, including poetry and even two books. She has been with the DDD Foundation since 2024.
![Sheri Anderson](https://dddfoundation.org/wp-content/uploads/2021/11/sheri-edited-1.jpg)
Sheri Anderson
Director of DevelopmentSheri Anderson is our Director of Development. She is originally from Brandon, Mississippi, but received her journalism degree from California State University. Sheri has worked in nonprofit management for nearly 35 years. She joined the DDD Foundation team in 2012.
![Tequiera Holton](https://dddfoundation.org/wp-content/uploads/2024/06/Q-head-shot-close-up-square-for-web-site.jpg)
Tequiera Holton
Sedation CoordinatorTequiera Holton is our Sedation Coordinator. She is originally from Florida, where she attended St. Leo University. After moving to Georgia, she continued her education for Medical Assisting at United Education Institute (UEI). She is a mother of one, and loves sports and drawing. She joined the team at DDD Foundation in 2024.
![Mary Boyle](https://dddfoundation.org/wp-content/uploads/2021/11/Mary-Edited.jpg)
Mary Boyle
BookkeeperMary Boyle is our part-time Bookkeeper. She has a Bachelor of Science in Accounting from Northern Arizona University (her home state) and a Master’s in Psychology from Georgia Tech. Mary moved from California to Atlanta in 1993, and has been with the DDD Foundation since 2017.