Here are instructions on assigning additional Admins to a Facebook Page:
- YOU must first be an Admin.
- Login as an Admin to the Page you wish to Add Admins or Contributors to.
- Click Settings at the top of your Page.
- Click Page Roles in the left column.
- If the person is already your Facebook friend, begin typing their name and select them from the list that appears. ...
- If the person is not a Facebook friend, enter their email address. ...
- Select a role from the dropdown menu you wish to assign to this user.
- The user will then be notified via Facebook that you have assigned them a Page Role.