Forster has previously played for Hibernian, Berwick Rangers, East Fife, Plymouth Argyle, Cheltenham Town, Dundee and Kelty Hearts.
[8] Forster also played in the 2013 Scottish Cup Final defeat by Celtic, replacing injured captain James McPake.
Seeking more regular first team appearances, Forster moved to EFL League Two club Cheltenham Town in July 2017.
Upon his return to the first team and forming a back 3 partnership with Christophe Berra and Josh Meekings, Forster quickly became a key player in for Dundee, helping the side to 5 consecutive clean sheets, as well as his first goal for the Dark Blues away to Queen of the South on 22 February 2020.
[22] On 22 June, following public backlash after Forster had pleaded guilty to domestic abuse charges involving a former partner,[23] Tranent announced that they had terminated his contract with immediate effect.