counterman
/ˈkaʊntərˌmæn/Definitions
1. noun
A person, especially a salesman, who works at a counter, such as a store or a restaurant counter.
“The counterman at the deli helped me choose the perfect sandwich for lunch.”
2. verb
to act as or work at a counter, especially to serve customers.
“He counts as a counterman at the coffee shop, taking orders and serving drinks.”