Dr. Keegan has practiced Oral and Maxillofacial Surgery at Oral Surgery Associates, PA since 1996. He graduated from Georgetown University, Washington, D.C. with a major in Biology and a minor in English. Dr. Keegan received his dental degree from Tufts University School of Dental Medicine, Boston, MA. He completed a General Practice Residency at the Washington, D.C. Department of Veterans Affairs Medical Center and was then selected to serve as the Chief Resident of the Department. Dr. Keegan completed his residency in Oral and Maxillofacial Surgery at Columbia University College of Physicians and Surgeons/ St. Luke’s-Roosevelt Hospital Center in New York City, serving as Resident and Chief Resident.