This qualitative, exploratory study was designed to explore a sample of eight recently appointed dual diagnosis workers' (DDWs) perceptions of their new role and function in Northern Ireland (NI). A semi-structured interview was used and respondents were assured that their anonymity/rights would be protected. All of the narratives were shown to the respondents for their approval prior to going to press. The transcripts were analysed by using a tried and tested analytical framework. Seven key categories emerged from the findings relating to the DDWs perceptions of their: (1)understanding of the term dual diagnosis; (2) hopes; (3) fears; (4) support in their new role; (5) key clinical issues; (6) the positioning of the service; and (7) their overall role and function. This is a new and important area of work in NI. However, to date, no research has been carried out on the topic in the province. Consequently, the findings from this small study could go some way towards helping to shape the future direction of, and bring about some universality to the provision of the dual diagnosis service within different National Health Service Trusts in NI. Further research is required on this new and growing service as well as on the service users' perceptions of the care provided by DDWs. The study will be followed up on an annual basis for 3 years to provide longitudinal data. Generalization of findings requires caution because of the small sample size.