Depends on what kind of service they provide. Examples could be waiter, waitress, caterer.
a caterer
Another name for a social service worker could be a social worker or a community support worker.
Another name for a roof worker is roofer.
HAT IS ANOTHER NAME FOR NATIONAL SOCIALIST GERMAN WORKER and PARTY?
They are sometimes referred to as a social welfare worker.
Blacksmith
artisan
barker
Jill.
paramedics
employee, hireling, jobholder
a hard worker
Baseball Player Construstion Worker Fast Food Worker Trucker