Swinson was drafted to Ayr in the Scottish Premiership for the 2017-18 season.[3]
Swinson has played for Newcastle Falcons in the English Premiership. He made his Newcastle 1st XV debut against Bath during the 2007–08 season. Swinson ended a disappointing season for the Newcastle Falcons by being named the Falcons Player of the Year.
Swinson finished runner up behind Brian McGookin for Falcons player of the year in 2009-10.
Swinson signed a deal with Glasgow Warriors to join them from Newcastle Falcons in the 2012–13 season.
Swinson announced his retirement from the game in May 2020 in order to pursue an apprenticeship in the same garage that his Scotland and Glasgow Warriors team-mate Gordon Reid holds a position in.
Despite having previously announced his retirement, Swinson signed a one-year contract with Saracens ahead of the 2020–21 season.[4] He extended his contract by a further year ahead of Saracens' return to the Premiership the following season.[5]
He played for Scotland 'A' making his debut in 2013 against England Saxons[6] He won 38 caps for Scotland.[7]
