This project aimed to develop a standard operating procedure (SOP) for suicide postvention in Fire Service. First, an existing SOP was refined through expert review. Next, focus groups were conducted with fire departments lacking a peer suicide postvention SOP; feedback obtained guided revisions. The current article describes the iterative process used to evaluate and revise a Suicide Postvention SOP into a Postvention guideline that is available for implementation and evaluation. Postventions assist survivors in grief and bereavement and attempt to prevent additional negative outcomes. The implementation of suicide postvention guidelines will increase behavioral wellness within Fire Service.