Ranks go in order:
Moderator > Admin > Super-Admin > Head Admin > Owner
Moderator is a rank with diminished powers (no access to chat logs, no perm ban, etc.) to let new staff get situated and figure out everything before receiving full administrating rights.
Admins are your general staff, they deal with server reports for the most part.
Super-Admins deal with forum reports, appeals, and more large scale issues, we discuss changes and ideas for the servers, and have a greater list of permissions and trust within the community.
The Head Admin deals with backend issues, VIP players, managing Staff, and lots of very very important things that don't get much direct attentions, they're also in charge of accepting or denying applications.
Xypher, (while we joke about how he does nothing) works to look into new servers, improving current servers, and is constantly on the lookout for new opportunities.