The assignment provides an overview of the various practitioner roles within a substance misuse service, including their responsibilities and required skills. It also highlights the importance of social justice, equality, and professionalism in practice. Furthermore, it emphasizes the need for informed consent, client confidentiality, and access to evidence-based interventions in treatment. The references provided include academic sources that support the discussion on motivational interviewing, solution-focused therapy, cognitive behavioral therapy, and specialist substance use skills.