Career
Thomson is a right-back and has previously played for Heart of Midlothian, Livingston and Dunfermline. Youth career
A Hearts supporter Thomson began his career playing for Loanhead Boys Club before joining Hearts Youth Academy signing a professional contract with the club in July 2003. Hearts
He earned an unexpectedly early debut in March 2005, when a flu epidemic at Tynecastle forced Hearts" head coach John Robertson into naming a plethora of youngsters in his first team squad against Inverness Caledonian Thistle.
Thomson started and impressed against the Highland side, and was rewarded with two further first team appearances that season.
lieutenant was a different story in 2005-2006 however, as a wave of new signings and Hearts" impressive form ensured Thomson spent the entire season playing reserve and under-19 football. In search of further playing time, Thomson was reunited with John Robertson, by then Livingston manager, for the 2006-2007 season.
Under Stephen Frail towards the end of the 2007-2008 season Jason played the final 5 games of the season. This meant upon Csaba Laszlo"s arrival Jason was a part of the first team squad.
He went on to start the season at Right back in Robbie Neilson"s absence and played a squad part for much of the season covering when either Neilson or Lee Wallace were out.
He signed a new 3-year deal in April 2009. First team appearances remained limited during season 2010-2011 and at the start of the 2011-2012 season he was loaned out to Dunfermline. During his time he was advised that he would be free to find a new club in January or at the end of the season.
On his return he failed to make a further appearance and in March was sent on loan again to Raith Rovers.
Livingston (loan)
In July 2006 Thomson joined Livingston on a season long loan. In all he made 21 appearances in all competitions.
Dunfermline (loan)
On 7 July 2011 Thomson Joined Dunfermline on a six-month loan deal. He made his debut on the opening day of the season against Street Mirren at East End Park and scored his first goal for the club against Kilmarnock on 10 September.
He had played every game for the club until Dunfermline played parent club Hearts and was unable to play due to a gentlemans agreement.
Thomson admitted he would be happy to make his loan deal permanent as he is delighted to be playing regular first team football. At the start of November Thomson suffered a groin injury. lieutenant had been suspected he had played his last game for the club with his loan deal expiring at the start of January, however he returned from injury in Dunfermline"s game against Street Johnstone on Christmas Eve.
Despite wanting to stay, on 29 December Dunfermline revealed they had not extended his loan spell and he returned to Hearts.
Raith Rovers
On 2 March 2012, Thomson joined Scottish First Division side Raith Rovers on loan until the end of the season. Thomson moved to Raith on a permanent basis at the end of the season.
