sentences:  From 2014-2016, he played for English side Wasps in the Aviva Premiership, though his first season saw little action due to a serious injury.In May 2016, it was confirmed that Jackson would be joining Premiership rivals Harlequins ahead of the 2016–17 season.Jackson re-signed for Glasgow Warriors in the summer of 2017, and extended his contract for a further year in 2018.