18 years of age or older

Able to understand and speak English

Able to give informed consent

Invited by the PI to participate, due to specific role within project sites (e.g., current Warden, treatment staff member, officer, study therapist)

Incarcerated in either East Central Arkansas Community Correction Center (ECACCC) or Northeast Arkansas Community Correction Center (NEACCC)

Have a pre-incarceration history of substance use disorder

Have a history of traumatic event exposure and self-report ongoing trauma-related difficulties

Be within 9 months of release from incarceration

Expect to reside in Arkansas throughout the study period

Evidence clinically significant PTSD symptoms during pre-treatment (baseline) assessment per the Structured Clinical Interview for the DSM

Have a pre-incarceration history of substance use disorder (confirmed by clinical interview)

Leveraging Implementation Science to Increase Access to Trauma Treatment for Incarcerated Drug Users