Waiter
From Memory Alpha, the free Star Trek reference.
A waiter is a person employed in a restaurant who takes and serves meal and drink orders. A female in this occupation is generally known as a waitress.
In 2268, Deep Space Station K-7 employed at least two waitresses, one a blonde, the other a brunette. (TOS: "The Trouble with Tribbles", DS9: "Trials and Tribble-ations")
In 2366, Katik Shaw was a waiter at the Lumar Cafe on Rutia IV. He later witnessed the abduction of Doctor Crusher. (TNG: "The High Ground")
Q masqueraded as a waiter briefly on Deep Space 9 where he served Doctor Bashir a cup of mint tea. When Q told Bashir to stay away from Vash, Bashir told him "My god, you're an impertinent waiter." (DS9: "Q-Less")
Ben was a waiter who served in Ten Forward in 2370. He was a friend to Taurik, Sito Jaxa, Sam Lavelle, and Alyssa Ogawa. (TNG: "Lower Decks")
When the staff of Quark's went on strike in 2372, Quark replaced them with holographic waiters. (DS9: "Bar Association")
Vic's Las Vegas Lounge had a number of waiters. In 2375, one was told by Tony Cicci to return a cheesesteak and to get him a new one "and I don't care if you gotta fly to Philadelphia to get me one." Cicci also hired Ezri Dax as a cocktail waitress. (DS9: "Badda-Bing, Badda-Bang")
