A professional who inspects, services, and tests railway tank cars used to transport compressed and liquefied gases. Respnsibilities include:

• Connects flexible hose from suction line to car and opens valves on car and in blowoff line to facilitate removal of residual gas from used tank cars.
• Removes safety and flow control valves from car with wrenches, replacing valves with reconditioned ones.
• Examines car interior for defects and cleanliness, passing light beam into car and viewing it through valve openings or entering car through dome.
• Washes interior with water and dries with steam.
• Routes defective cars for repair.
• Tests tanks for leaks.