Each group has one or more administrators. To view the administrators in a group, click on the Administrator button in the group menu. This will open the Administrator screen. Here you will see a list of all the administrators in your group and their permission levels. You can edit their permission levels by clicking on the Edit link. You can remove an administrator by clicking on the remove link. For a complete description of the permission levels available to the administrators, see the Administrator Permissions section.
You can invite additional administrators to your group by clicking on the Invite Administrators button. Enter the email addresses of the administrators you want to invite, select the permissions you want the new administrator to have in this group, and hit send. An email invitation will be sent to the administrator.
Administrators must be invited to each group and can have unique permissions in each group. This will allow you to create complex organizational structures if you desire.