I am ultimately responsible for multiple projects running simultaneously and could benefit from a view of multiple projects in one Trello board. My individual project managers don’t need this view; the individual project managers only need to see their own project. Is there a way to collapse boards together?
There isn't a way to collapse boards together.
There have been a lot of requests for a view that combines all your cards across all boards. There is a card for it here: https://trello.com/c/UOIrt48P