This paper addresses the under-researched issue of stakeholder identification and engagement in problem structuring interventions. A concise framework to aid critical reflection in the design and reporting of stakeholder identification and engagement is proposed. This is grounded in a critical-systemic epistemology, and is informed by social identity theory. We illustrate the utility of the framework with an example of a problem structuring workshop, which was part of a green innovation project on the development of a technology for the recovery of rare metals from steel slag.