This document describes baseline and additional EMS criteria for the National Emergency Response Credentialing System. The EMS Working Group determined the job titles listed herein to be the most commonly requested EMS personnel in a state-to-state, mutual aid-based response. Considering existing, nationally-accepted standards and/guidelines, the EMS Working Group extracted relevant education, training, experience, physical/medical fitness, certification, and licensing criteria to define the baseline criteria for each job title listed. These baseline criteria represent the minimum requirements for EMS personnel to participate in the Incident Management Integration Systems Division's National Emergency Responder Credentialing System. The EMS Working Group identified additional recommended criteria relating to education, training, certification, experience, and physical/medical fitness where it believed such standards and baseline criteria might enhance job performance. These criteria are not required and represent the EMS Working Group's recommendations for EMS personnel to participate in the Incident Management Systems Integration Division's Emergency Responder Credentialing System. Many nationally recognized clinically-based certification/verification courses such as Advanced Cardiac Life Support are appropriate and essential resources for field personnel.