Wikimedia Site Reliability Engineering

The technical operations team, or ops team for short, is the group of people that maintain Wikimedia's servers and run its 800+ individual wikis. Also known as the system administrators, they are in charge of making sure the MediaWiki software runs smoothly on all the wikis, regulating system resource use, maintaining Wikimedia's hardware and software, and creating and closing wikis.

Additional documentation related to technical operations can be found on Wikitech.