A peer support team (PST) is a group of selected personnel (1) who are formally established and recognized as a peer support team in agency policy, (2) who have been specially trained in the principles of individual and group peer support, (3) who function under agency approved operational guidelines, and (4) who provide peer support under the advisement or supervision of a licensed mental health professional. Properly trained and clinically supervised peer support teams have two primary functions. They (1) provide peer support for personnel confronting challenging stressors of everyday life and the stressors and challenges following traumatic calls (2) serve as an essential component of the agency’s response to personnel-involved critical incidents.