Moral Reconation Therapy (MRT), an evidence-based intervention to reduce risk for criminal recidivism among justiceinvolved adults, was developed and primarily tested in correctional settings. Therefore, a better understanding of the implementation potential of MRT within non-correctional settings is needed. To address this gap in the literature, we evaluated the adoption and sustainment of MRT in the US Veterans Health Administration (VHA) following a national training initiative in fiscal years 2016 and 2017. In February 2019, surveys with 66 of the 78 VHA facilities that participated in the training were used to estimate the prevalence of MRT adoption and sustainment, and qualitative interviews with key informants from 20 facilities were used to identify factors associated with sustainment of MRT groups. Of the 66 facilities surveyed, the majority reported adopting (n = 52; 79%) and sustaining their MRT group until the time of the survey (n = 38; 58%). MRT sustainment was facilitated by strong intra-facility (e.g., between veterans justice and behavioral health services) and inter-agency collaborations (e.g., between VHA and criminal justice system stakeholders), which provided a reliable referral source to MRT groups, external incentives for patient engagement, and sufficient staffing to maintain groups. Additional facilitators of MRT sustainment were adaptations to the content and delivery of MRT for patients and screening of referrals to the groups. The findings provide guidance to clinics and healthcare systems that are seeking to implement MRT with justice-involved patient populations, and inform development of implementation strategies to be formally tested in future trials.