Dr. Leonard Brennan is Co-Director of HSDM’s Geriatric Fellowship Program and is a part-time lecturer in their Department of Oral Health Policy and Epidemiology. Dr. Brennan has practiced general dentistry in Portland, Maine for more than thirty years. As co-director of the HSDM geriatrics fellowship program, Director of MOTIVATE (Maine Oral Team-Based Initiative: Vital Access to Education) and a member of the team collaborating on the Nurse Practitioner-Dentist initiative with Northeastern University, Dr. Brennan has extensive experience developing team based approaches to multidisciplinary teams caring for the elderly and underserved in rural areas. In his role at the Center, Dr. Brennan is responsible for helping coordinate the team learning and designing the training and technical assistance modules.

Dr. Brennan completed a Harvard University Geriatric Dental Research and Teaching Fellowship Program, and was recognized for his postdoctoral work at Harvard as the recipient of the Dr. James Dunning Award for excellence in biomedical research and teaching. He is guest editor for Dental Clinics of North America's Dental Geriatric Edition and the author of the chapter “Cognitive Impairment in Older Adults.” Nationally, Dr. Brennan was a presenter on “Oral Health and Systemic Disease” at the American Society on Aging Conferences in Washington and San Diego. In 2009, he traveled to northern Haiti to begin a geriatric assessment of the population of Cap Haitien. Since 1982, he has taught oral health for the Medical Geriatric Fellowship Program at Maine Medical Center. Locally, he has been involved in many community dental and medical organizations and as a volunteer in the Dental Lifeline Network for which he was nationally recognized by CNN Money magazine with the 2014 "Hero Award" for his work with the elderly and other fragile individuals