The son of former Liverpool player Geoff Twentyman, Geoff Jr. began his career as a trainee at his father's club, but after failing to make the grade there he played for Formby before being sold on to Chorley[4] for around £1,000 and from there to Preston North End.
[5] After making 98 league appearances for Preston, scoring four goals, he was released by the Lancashire club,[4] and was signed by Bristol Rovers.
He was taken to Rovers by Bobby Gould, and was later managed by Gerry Francis, playing a total of 252 league games, scoring six goals, and made a Wembley appearance in the final of the Associate Members' Cup in 1990.
Twentyman began coaching youth football with Brimsham Green F.C.
[4] When Francis left Rovers in 1991, Twentyman applied for the vacant manager's job, but was not appointed.