It means "computer operator": "a role in IT which oversees the running of computer systems, ensuring that the machines, and computers are running properly" [0]

It means "computer operator": "a role in IT which oversees the running of computer systems, ensuring that the machines, and computers are running properly" [0] ― a rather interesting article to read even on its own. [0] https://en.wikipedia.org/wiki/Computer_operator https://en.wikipedia.org/wiki/Computer_operator