Caretaker

A caretaker, or janitor, was an employee tasked with management of defined premises.

Paradise Towers was kept tidy and free of wallscrawl by caretakers who followed a strict set of protocols laid out in their rulebook. (TV: Paradise Towers)

When the Tenth Doctor told Adelaide Brooke about his sonic screwdriver, she asked him if he was the Doctor or the Janitor. The Doctor replied, "Sounds like me. The maintenance man of the universe." (TV: The Waters of Mars)

The Eleventh Doctor called himself "the Caretaker" in conversation with Madge Arwell and her children, who subsequently referred to him by the name. (TV: The Doctor, the Widow and the Wardrobe)

In 1963, the caretaker of Coal Hill School was responsible for opening the doors in the mornings, and had to smash the ice in the toilet bowls every morning in the winter. (PROSE: Time and Relative) In November, the caretaker went missing. When the Seventh Doctor showed up, headmaster Harvey Parson thought he had come for the job of caretaker. (TV: Remembrance of the Daleks)

The Twelfth Doctor hypnotised the caretaker of Coal Hill School, Atif Basra, into believing he had influenza so that he could take up the role, under the name "John Smith", and lay a trap for a Skovox Blitzer. (TV: The Caretaker)