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