The majority of women entering substance use treatment have a trauma history, placing them at risk for revictimization and substance use relapse. The purpose of this project is to implement a pilot study to investigate the feasibility and preliminary efficacy of a peer support specialist-delivered violence prevention program for women in substance use treatment. The program entails a posttraumatic stress disorder (PTSD) screening, trauma-focused resource referral, and two session interpersonal violence prevention protocol for 60 participants. In this single arm trial, women are recruited from three substance use treatment facilities. Participants complete baseline, post-intervention, one-month, and three-month follow-up assessments. Self-report surveys assess demographics, trauma and sexual assault experiences, knowledge and attitudes towards sexual and intimate partner violence, protective behavioral strategies, and intervention satisfaction and engagement.