@KentKersey1 Creating a custom admin role for the Dean is an option, and you would need to decide if you want to tailor the permissions for the sub-account admin. If making a custom role, I recommend that you crfeate the role at the root account-level so that it could be assigned to admins in all sub-accounts without the need to re-create the custom role in each sub-account.
If a user has an admin role at the sub-account level, that user is able to access all of the courses within that sub-account. If you want to provide particular permissions for the user within certain sections, you may want to enroll the user in those sections. For example if you want your dean to be able to view all the courses in the sub-account, but only grade students in certain assigned sections, you could create a custom admin role that allows the admin/dean to view courses but not edit grades. You could then enroll the dean in the sections that are assigned to grade with a teacher (or custom teacher/TA-based role) in those sections.