Dr. Leonard Brennan, DMD, is Co-Director of Harvard School of Dental Medicine's Geriatric Fellowship Program, a part-time clinical instructor in their Department of Oral Health Policy and Epidemiology, and collaborates with Harvard's Departments of Integrative Medicine and Global Health. He is also the Geriatric Adviser and a Lead for Harvard's "National Center for Equitable Care for Elders," Mentor and Geriatric Specialist for Harvard's, "Nurse Practioner- Dental Interprofessional Model," and Mentor and Geriatric Specialist for Harvard's "Oral Health Workforce for Rural and Vulnerable Populations."