Having multiple Project managers can possibly hurt the project, two capable people having the same command on a project can hit a wall in progress. “One person is the Project Manager and underneath the project manager are a bunch of Project Leads from different departments.” The structure you mentioned is ideal I think. Having sub-teams with leaders and one overall project manager is the best form of management. But this can only work if the leads are capable of making an important independent decision, and also able to relay appropriate information to the PM. This system has a sort of checks and balance system where the PM as the overriding rule, but the sub-team leaders as a whole can also have an impact on the project.