Dr. Mandel has been a Professor of Oral and Maxillofacial Surgery at Columbia University College of Dental Medicine since 1951 and, and is currently the Director of the Salivary Gland Center. He received both his dental degree and his training in oral and maxillofacial surgery from Columbia University, and is a Diplomat of the American Board of Oral and Maxillofacial Surgery. Dr. Mandel is very active in teaching at both the dental student and resident level, and is a world renowned expert on salivary gland diseases. He has lectured extensively both nationally and internationally, and has over 100 publications on salivary gland pathology in the literature as well as in textbooks. , Dr. Mandel publishes a quarterly newsletter for the Salivary Gland Center.