Background. Metacognitive Reflection and Insight Therapy (MERIT) is a manualized, evidence-based approach that supports occupational participation through its focus on the inter-related constructs of meaning making, positionality, and self-definition (Lysaker et al., 2020). MERIT's core tenets parallel the fundamentals of occupational therapy, making it an ideal guiding methodology for mental health occupational therapy practice. Purpose. We outline key constructs of MERIT and detail how occupational therapy practitioners can apply MERIT to support occupational engagement. Key Issues. Few manualized, evidence-based interventions exist to guide occupational therapy mental health practice (Kirsch et al., 2019). Detailing MERIT and its application in occupational therapy is an important first step in future studies of its feasibility, acceptability, and effectiveness in this context. Implications. MERIT provides a clear methodology for delivering mental health occupational therapy services that is amenable to large-scale hybrid implementation and effectiveness studies, thereby supporting practice and rigour in research.