Inclusion Criteria:  Participants must (1) be receiving or referred to MOUD; and (2) be over the age of 18.  Exclusion Criteria:  Exclusion criteria will be (1) demonstrating active, unstable or untreated psychiatric symptoms, including mania and/or psychosis; or (2) inability to understand the study and give informed consent in English Active, Unstable or Untreated Psychiatric Symptoms: The study team is committed to recruiting a sample that reflects the complexity and likely comorbidity of people with moderate to severe OUD in this setting. Therefore, we will only exclude people whose concurrent mental health issues preclude ability to participate with the procedures in this study. Throughout the study, researchers will monitor for active, unstable or untreated psychiatric symptoms as the presence of these symptoms during study procedures would interfere with participation. Monitoring for exclusionary psychiatric symptoms can include reviewing data in medical chart (per protocol-approved access to medical records), observation during assessments and intervention sessions, and/or current symptoms detected on the MINI modules for psychosis and mania.  Inability to complete informed consent/ study in English. This study/intervention will be implemented in English only. Therefore, the capacity and willingness to give written informed consent in English, to understand the study and inclusion and exclusion criteria in English.