Ellingworth competed as a professional cyclist between 1995 and 1997 and represented his country several times at international events. He was the coach for British Cycling"s U23 Academy "100% Master of Engineering" team based in Tuscany, Italy. Mark Cavendish is one of the riders who has been influenced by Ellingworth with Cavendish stating in several interviews that he had learnt a lot from Ellingworth, and not only about cycling.
Ellingworth has also led the National team to several stage victories in the Tour of Britain in 2007.
Ellingworth worked on Cavendish"s hill climbing by motorcycling up a hill and making him chase him to the top.