Warhammer 40k - Lexicanum:Sysop
Administrators, commonly known as admins and also called sysops (system operators), are Lexicanum editors who have been entrusted with access to restricted technical features ("tools") which help with maintenance. They are given additional abilities that allow them to deal with vandalism and other such issues - the ability to edit any visible page on the wiki (regardless of protection), in any namespace, the ability to semi-protect or full-protect pages, delete and undelete pages and files, block users, and rollback particularly egregious vandalism.
Administrators undertake additional responsibilities on a voluntary basis, and are not employed by Lexicanum, Generally, the maintenance and administration of Lexicanum can be conducted by anyone, without the specific technical functions granted to administrators.
Because administrators are expected to be experienced members of the community, those seeking help will often turn to an administrator for advice and information. When the communal feeling may be unclear, administrators may help provide a thoughtful voice in some kinds of consensus.
Further information is available at Lexicanum:Administrators.