Hello!
I need to be 100% sure that anyone with the Administer Jira global permission is able to adjust workflows, fields, issue types, and all kinds of schemes for company-managed projects.
I had a bunch of users as site admins because I thought that was the only way they could edit company-managed project workflows, but they don't need the ability to add users, so I switched those users to the administrators group which is assigned to this global permission.