Using a case study methodology, this article describes the process of implementing a cognitive-behavioural program in eight residential facilities in a Centre jeunesse du Québec. The objectives were to better understand the steps required to consolidate the implementation of the program and to identify structural factors that facilitate and impede the progress of successful implementation. Documentary analysis and qualitative interviews allowed deconstruction of the implementation process into seven phases: initial reluctance, training, exploration, resistance, application, reconciliation, and integration. The analysis shows that several structural factors have a noteworthy influence on the implementation process in this case study: the opportunities for discussion, the quality of the program to be implemented, the organizational context, and the team social climate. These factors largely shape the framework of the implementation process. The results of the case study may be useful in other implementation processes, allowing identification of potential difficulties and the mechanisms required for their resolution.