The role that should help facilitate an Agile Release Train (ART) Sync is Product Management. The Release Train Engineer (RTE) is primarily responsible for facilitating ART events and processes, which includes the ART Sync1. However, Product Management plays a crucial role in this process as well. They are involved in preparing for the event, ensuring that the business context and product strategy are clearly communicated, and that the teams are aligned with the priorities2. This collaboration between the RTE and Product Management ensures that the ART operates effectively and delivers value continuously.