[3] He has played for Celtic, Stenhousemuir, Airdrie United, Rochdale, Cowdenbeath, Queen of the South, Hamilton Academical, Falkirk and Raith Rovers.
In January 2012 Thomson signed a new two-year contract with the club, and was registered in the squad for the 2012-2013 UEFA Champions League campaign.
[14][15] Thomson made his Blue Brazil debut in a 3–2 defeat against Hibernian on 13 September 2014, where his father had previously been the goalkeeping coach.
[17] On 31 August 2016, Thomson was released by the Dumfries club by mutual consent, after Lee Robinson's return to Queens as first choice goalkeeper.
He is the son of former goalkeeper Scott Thomson who played mainly for Raith Rovers, as well as Forfar Athletic and some other clubs.