Women firefighters have high rates of post-traumatic stress disorder, increases in certain cancers, and adverse reproductive outcomes compared to women in the general population. However, the lack of sufficient information on the causes of and mechanisms leading to these occupationally related illnesses limits the creation of effective interventions. The goal of this project is to evaluate stress, cancer risk, and reproductive toxicity in women firefighters and to develop, beta test, and assess the feasibility of a peer support intervention. This project was funded by the Federal Emergency Management Agency.