Yale Emergency Medical Services | 142 followers on LinkedIn. Yale Emergency Medical Services (YEMS) is both a registered Yale undergraduate organization and a state-licensed EMS agency, providing regularly scheduled EMS standby coverage to the Yale campus as a part of Yale Health. As an EMS agency, we operate under the New Haven Sponsor Hospital Program with medical direction from Yale Emergency Medicine. YEMS members are Yale students who hold Connecticut state certification at the EMT level or higher, and YEMS is managed by an executive board with guidance from its Board of Advisers.