We have a CERVIS user that has been assigned the "Group Leader" access level and has also been assigned as the event organizer for a specific event. When this individual logs into CERVIS he is able to register anyone in the system for the event that he is the organizer of. I thought a user with the "Group Leader" access level was only able to register for members of their group. Why is this user able to register volunteers that are not a member of their group?
When a CERVIS user is assigned as the "Event Organizer" for an event, that user has complete control over the registration for that event. This includes the ability to register any volunteer in the system for that event. As an event organizer, the CERVIS user only has access to the volunteer's phone number and email address since that is information that might be needed to fulfill the duties as the event organizer, but they do not have access to the entire profile or the ability to update any volunteer's profiles. If you would like this CERVIS user to only have access to the members of their group, then you will need to remove them as the "Event Organizer".
For details regarding the different CERVIS access levels and associated permissions, please reference the following support knowledge base article: http://support.cervistech.com/entries/336715-CERVIS-access-levels-permissions.