- This page covers the people who manage and maintain the Wikimedia Foundation servers. Historically, these people were known as "developers," now an inaccurate term. For information on developers of the MediaWiki software, see the Developers page on MediaWiki.org. For the administration access of wiki pages and users known as "administrators" or "sysops" see administrator.
Wikimedia Foundation system administrators perform systems administration work on the Wikimedia servers. Their primary task is to ensure that the Foundation's collection of over 800 wikis continue to function smoothly, so that users can continue to read pages and make changes. Aside from maintaining the hardware and software in the Wikimedia server clusters, they are responsible for updating and configuring the version of the MediaWiki software that runs on the Wikimedia servers, and can perform administrative tasks requiring direct server or database access, such as creating new wikis, closing wikis, changing configuration settings etc.
The Wikimedia Foundation legally controls the servers, so the Wikimedia Board of Trustees are ultimately responsible for determining who has sysadmin access, and how that responsibility is exercised. In general, the Foundation's CTO has overall authority on all technical matters. On a day-to-day basis, various system administrators with root or shell access manage the server clusters.
System administrator actions 
Although system administrators are often not active on Wikimedia wikis themselves, they may occasionally need to perform actions for technical reasons, such as blocking users or bots that are consuming unacceptable amounts of system resources, or undoing edits that put heavy strain on the servers. Such actions should not be undone without consulting the system administrator.
To facilitate these changes being made in a transparent fashion with no need of the steward flag, all system administrators who want to are members of the 'sysadmin' global group (automatic members lists). This group allows them to set user rights for any user on any wiki, in the same fashion as stewards. So if a system administrator needs to perform an action restricted to administrators (like editing system messages) on a particular wiki, they can simply grant themselves admin status on that wiki to make the action. In addition, the 'sysadmin' group has access to Special:GlobalGroupPermissions, where system administrators can change the permissions assigned to their global group. So as an alternative, the system administrator could add editinterface to the global group permissions, and would then be able to edit system messages on all wikis.
System administrators are encouraged to use the latter method of granting permissions, to avoid the lists of administrators/bureaucrats on local wikis becoming cluttered with users who are not 'genuine' members of those groups. These self-promotions may be removed at any time by stewards, as they can be easily restored if needed. However, some system administrators have permissions on certain wikis as a result of due process on that wiki, for instance Tim Starling's adminship on English Wikipedia; such rights should not be removed in this fashion.
- Do not contact people on this list directly if you need something done. Instead, go to the #wikimedia-operations irc channel or file a ticket on bugzilla.wikimedia.org.
Do not treat the below list as accurate or complete. It is a convenience list to look up aggregated information. Most of the technical Wikimedia Foundation staff have some form of shell access. There are various levels of shell access (through user groups) and many (whether or not overlapping) groups of servers that access is granted to. For simplification the list below considers all servers to be the same and there to be only (regular) "shell" and "root shell". In reality one could have shell access in a certain user group to one server cluster, and be in a different user group (or none at all) in another cluster.
|Andrew Bogott||Andrew Bogott||andrewbogott||•||•|
|Ariel Glenn||ArielGlenn||atglenn or apergos||•||•||•|
|Leslie Carr||LeslieCarr||lcarr or lesliecarr||•||•|
|Mark Bergsma||Mark Bergsma||mark||•||•|
|Ryan Lane||Ryan lane||Ryan_Lane||•||•||•|
|Tim Starling||Tim Starling||TimStarling||•||•||•|
|Aaron Schulz||Aaron Schulz||AaronSchulz||•|
|Erik Zachte||Erik Zachte||Erik_Zachte||•|
|Trevor Parscal||Trevor Parscal||TrevorParscal||•|
|Andre Klapper||AKlapper (WMF)||andre__||•|
|Brion Vibber||Brion VIBBER||brion||•|
|James Forrester||Jdforrester (WMF)||James_F||•|
|Mark A. Hershberger||MarkAHershberger||hexmode||•|
|Oliver Keyes||Okeyes (WMF)||Ironholds||•|
|Sumana Harihareswara||Sharihareswara (WMF)||sumanah||•|
Initially, it was Jimmy Wales who installed software, ran update programs etc. on the servers. In March 2002, he proposed to give login accounts to some of developers ("Trusted user access to machine", Wikitech-l).
System administrators formerly had an important role in the Wikipedia power structure, since they were the only ones able to promote and demote sysops, and lock user accounts (before the "block" feature of MediaWiki existed).
Some sysadmins had shell access to the California servers, but due to inactivity, weren't given shell access on the "new" Florida servers. Magnus Manske, April King, Lee Daniel Crocker, Axel Boldt, Matthias Jordan, Neil Harris and Ed Poor are all in this category.
See also 
- System administrators:
- Special global permissions
- A perfectly up to date list of "roots" and "mortals" sysadmins is also visible on gerrit, e.g. .
|Local:||blocked user – unregistered user – newly-registered user – registered user – bot – administrator – bureaucrat – oversight – checkuser – IP block exempt – importer – centralnotice admin|
|Global:||locked account – unified account – bot – rollbacker – abuse filter editor – interface editor – IP block exemption – new wiki importers – sysop – ombudsman – founder – staff – system administrator – steward|