ABSTRACTThe energy sector needs to transform towards sustainability. The multi-level perspective on sociotechnical transitions is embracing an enactment perspective, which focuses on the agency of various actors in shifting transitions pathways but has yet to study local urban experiments from such an enactment perspective. Our empirical research examines an innovation intermediary’s work in destabilising the regime rules in relation to the local energy incumbent company in Helsinki, Finland. Our paper seeks answers to the questions: How does the collaboration of the intermediary and the local energy company unfold? What are the impacts of the intermediary work on the local energy company in terms of enactment of transition pathways and what are the mechanisms causing the impact? Our research shows that the intermediary contributes to the transition by disturbing existing rules, structures, practices and networks by convening innovation champions from different constituencies, renegotiating regime rules a...