Dr. John D. Callahan grew up in the Strathmore area of Syracuse and later in Manlius, graduating from Christian Brothers Academy in 1972. He received his undergraduate degree from Notre Dame and earned a Doctorate of Dental Surgery from Georgetown University. In 1982, he received a post-doctoral degree in orthodontics from St. Louis University and returned to Syracuse to join his father's practice.

Dr. John is actively involved in strengthening the orthodontic profession. He is the current president of the Northeast Society of Orthodontics (NESO) through 2012, which includes New York, New England and the eastern Canadian provinces. On the national level, he is a member of the Council on Insurance for the American Association of Orthodontics (AAO).

Dr. John has been happily married since 1982 to Elet, a professor of law and public policy in the Whitman School of Management at Syracuse University. His son, Michael, attended Rochester Institute of Technology and is now an entrepreneur in the Rochester area. When Dr. John is not creating great smiles or working with NESO and the AAO, he can be found cheering at the Carrier Dome, playing golf or racquetball, scuba diving and enjoying the company of family and friends.

Dr. John truly loves what he does. "Our patients are great people, and our staff is terrific. We create healthy mouths and great smiles and have fun doing it."