Introduction: Major trauma care is complex, and requires individuals and teams to perform together in time critical, high stakes situations. Scenario based simulation is well established as a strategy for trauma teamwork improvement, but its role in the relational and cultural aspects of trauma care is less well understood. Relational Coordination theory offers a framework though which we aimed to understand the impact of an established trauma simulation program Methods: We studied simulation activities using a narrative survey of trauma providers from anaesthesia, emergency medicine, medical imaging, surgery, trauma service, intensive care and pre-hospital providers at Gold Coast University Hospital, in conjunction with data from an ethnography. Data analysis was performed using a recursive approach - a simultaneous deductive approach using the relational coordination framework and an inductive analysis. Results: 95/480 (19.8%) staff completed free text survey questions on simulation. Deductive analysis of data from this narrative survey results using the RC framework domains identified examples of shared goals, shared knowledge, communication, and mutual respect. Two major themes from the inductive analysis – “Behaviour, process and system change”, and “Culture and relationships” - aligned closely with findings from the RC analysis, with additional themes of “Personal and team learning” and the “Impact of the simulation experience” identified. Conclusion: Our findings suggest that an established trauma simulation program can have a profound impact on the relational aspects of care and the development of a collaborative culture, with perceived tangible impacts on teamwork behaviours and institutional systems and processes. The RC framework – shared knowledge, shared goals and mutual respect in the context of communication that is timely, accurate, frequent and problem-solving based – can provide a common language for simulation educators to design and debrief simulation exercises that aim to have a translational impact.