The National Institute for Clinical Excellence identifies educational psychologists as appropriate specialists to deliver interventions to promote the emotional well-being of children and families. A role for practitioner educational psychologists in providing specific therapeutic interventions has also been proposed by commentators. The present study reports an evaluative case study of a narrative therapy intervention with a young person who self-harms. The analysis of data suggests that the narrative therapy intervention was effectively implemented and resulted in attributable gains in emotional well-being, resilience and behaviour for the young person. The authors discuss the role of the educational psychologist in delivering specific therapeutic interventions within a local authority context and school-based setting. Consideration is also made of the development of the evidence base for the effectiveness of narrative therapy intervention with young people who self-harm. (Contains 2 figures, 3 tables, and 2 notes.)