An executive director is the senior operating officer or manager of an organization or corporation, usually at a nonprofit. The executive director is responsible for strategic planning, working with the board of directors (B of D), and operating within a budget.
A Project Manager is responsible for planning, overseeing, and leading projects from ideation through to completion. This is a senior role at an organization and requires interaction with a range of internal and external stakeholders, most often managing several moving project parts simultaneously.