The fireman helps maintain the engine, and, along with the driver, keeps the engine in control and provides a voice of reason when an engine is being difficult.
While the engine is moving, they shovel coal into the fire and keep the water level where it needs to be, and fill up an engine's water tanks or tender. After a day's work is over, they clean out the ash from the firebox. They also couple the engine if a shunter isn't around. A fireman's uniform is blue trousers, a white shirt, and a black tie, with a blue jacket over it, and a blue cap.
- From the eighth to sixteenth seasons of Thomas and Friends, drivers and firemen act almost purely as background characters and are very rarely acknowledged, but from the seventeenth season onwards, they have been seen more often and have worked more realistically.
- To date, only one fireman has been named: Sidney Hever, Edward's fireman.