majordomo

noun

1. The head servant or official in a royal Spanish or Italian household; later, any head servant in a wealthy household in a foreign country; a leading servant or butler.

   “Pancho, the major-domo, came up to say that Colonel Morales was waiting below. Appleby bade him bring out cigars and wine, and rose from his seat when Morales came in.”

   “In return for ruling over the king's palace, serving as the monarch's alter ego in the domestic sphere, and bearing the burden of accountability, the majordomo was compensated amply.”

2. (US)A manager of a hacienda, ranch or estate.

   “She called upon a Missouri cousin named Edward Hardy Clark, who became the indispensable majordomo of the Hearst estate.”

3. (US)Any overseer, organizer, person in command.

   “The United Nation's climate majordomo -- tasked with herding 192 nations toward a do-or-die deal by year's end -- does not have the power to impose an agreement on how to curb greenhouse gases and cope with its consequences.”