In 2010, workers at the Centre de jour de Québec noticed that the trauma users had experienced was weakening adherence to the treatment. In 2012, a research project highlighted the importance of creating a concomitant PTSS and SUD program. In 2013, an intervention program was developed and integrated into the service offer. Adapted from the proven Seeking Safety model, the Maître de sa vie program is addressed to adults struggling with an addiction and presenting a clinical profile relating to the following traumatic events: physical, psychological or sexual aggression. The program is offered on a weekly basis and includes six group workshops. It gives users an awareness of the impacts of the traumas they have experienced, guidance on developing appropriate and safe strategies and an understanding of the relationship problems they are having because of the experienced events. As an integrated program, problems of mental health and substance abuse are dealt with simultaneously to offer the best chances for recovery possible. In 2016, an implementation and progress evaluation of the participants was completed. Based on users’ participation experiences, the study found that the program had a beneficial effect on their recovery. In 2017, the initial program was adapted to the evaluation’s results. Since its launch, over 200 participants have benefited from the program. Two guides were produced: one for participants and one for counsellors. The program has been the subject of a number of presentations and one deployment plan.