As an admin for my organisation, how can I see who has completed projects?

As an admin, to see who has completed tasks log in to and navigate to the 'Dashboard' page from the drop down menu seen in the top right here:
If you would like to see a full report of Angels working on projects, then navigate to your profile in the top right and open up the menu by clicking on your profile picture:
You can then select Organisation Members, which will take you through to the page you see below:
You can then simply download a CSV file showing Angels currently working on projects as well as completed projects.