Trackman

A platelayer (British English), fettler (British English – UK, Australia, NZ) or trackman (American English) is a railway employee who inspects and maintains the permanent way of a railway, usually working in teams or gangs under the charge of a foreman called (in UK, Australia and NZ) the "ganger", often assisted by an assistant ganger. The term "platelayer" derives from the plates used to build plateways, an early form of railway.