The document details an intensive support service (ISS) for adults with complex substance abuse issues, initiated in 2004 to address high rates of failure among clients in traditional treatment settings. It describes the characteristics of the clients, the roles and skills of the supporting clinicians, and the comprehensive, outreach-focused approach taken to build trust and facilitate recovery over extended periods. Case examples illustrate the challenges faced and progress made within the context of long-standing individual struggles with addiction and mental health.