counterman

plural countermen

1. USA man who serves behind a counter, especially in a diner.

   I looked for the counterman, seeing him serving a plate of pork chops and grits to a man with a pale blond moustache.

   1952, Ralph Ellison, Invisible Man, Penguin Books (2014), page 179

   1 more example

   There was a cashier up front and behind this long counter were about five countermen, evenly spaced. Each morning Joey and I would sit at the very last station in the back and chitchat with Tony, the counterman there who as a very old guy who usually got your order wrong.

   1984, John Fox, chapter 15, in The Boys on the Rock, page 85

plural Countermans

1. A surname.