The project manager is expected to assume a leadership role in change management. Change management projects have a different mission from other projects. A change project is expected to produce an innovative result or deliverable, where the old type of project management focused on more predictable results. To understand how to effectively manage change in projects, we needto understand what roles and functions are performed by project managers in change management. We performed a simulation experiment, guided by interviews with change management specialists. The simulation was performed with the multi-agent simulation software Artisoc, and we report its results here.