An employee who coordinates the work of the yardmaster and the roundhouse foreman; he reports directly to the superintendent.

a railroad employer who is in charge of a railway yard

An executive officer who supervises train service operations on one or more divisions or on part of a division. He also supervises the operation of trains at terminals and in yard service.

Supervisor who controls train operations within a specific area.

A trainmaster is term for a superintendent or supervisor of a US freight railroad or a section of one. The trainmaster is responsible for seeing that policies of the rail company are enforced, and for the way they are enforced. The actions of the[a] trainmaster are seen as policies and practices that emanate directly from, and are sanctioned by, the occupants of the railroad’s boardroom and executive suite.