If you are an admin or manager on an Enterprise account, you can change another member's role at any time. To learn more about each role, check out this article: Enterprise roles and permissions
Note: Managers cannot change a member's role to admin.
To change a member's role:
- Sign in to your Enterprise account and navigate to the People page.
- Click the Members tab.
- To the right of the user you want to change, click the drop-down and select the correct role.
If you need to add or remove a member from your Enterprise organization, check out this article: How do I manage member invitations for my Enterprise account?