Following therapist training, certification and piloting, eligible women will be invited to participate in the study. Interested potential participants will be screened for major inclusion/exclusion criteria including age, alcohol/substance use, history of trauma and psychiatric/health/medication status. If potentially eligible, an Institutional Review Board (IRB) approved informed consent will be obtained and participants will be scheduled for a baseline assessment appointment. If an individual is ineligible to participate in this research protocol, she will continue in her usual community treatment program and/or if indicated, be referred for additional treatment services. The investigators decided to limit the study group to women because they represent the largest percentage of patients with comorbid PTSD and SUDs and most have experienced sexual and/or physical trauma. So when trauma-focused treatment is delivered in a group setting for this population, single sex groups create a safe, comfortable and open atmosphere that is required for MM-based treatment and trauma focused work. After having at least 7 days in standard treatment baseline assessments will be collected. Women meeting inclusion with no exclusionary criteria will be randomized to MBRP plus TAU or TAU alone control. Both groups will attend their standard intensive TAU program. The eight MBRP therapy sessions will be integrated into the standard TAU program and replace 8 TAU SS sessions. Participants will be introduced to the therapists and scheduled for their first individual/small group session.