Alfie works for the Sodor Contruction Company; he loves working hard and handles even the toughest of jobs with ease.
A magazine article states that he now works at the quarry. He is known to be best friends with Jack.
Alfie is a friendly machine who gets on well with his work and never minds getting dirty or mucky during jobs.
Alfie is painted green with his number painted on his sides and on the back of his cab in white.
It is unknown what machine Alfie's design is based on, although he does resemble a 1960 K1C10&K excavator.