Dewey first made his name in the amateur game in Scotland. He was the
Scottish Premiership Division One joint top try scorer for the 2004–05 season while playing for
Heriot's with 16 tries, and made four appearances (including two starts) for
Edinburgh Rugby. This form earned him a professional contract with Edinburgh who signed him ahead of the 2005–06 season. He scored eight tries in just 11 games in his first year of regular professional rugby union. Unfortunately, he suffered two dislocated shoulders in the same season, and so was unable to build on this tally. In 2007, Dewey joined rival
Celtic League side,
Ulster, making his debut against
Leinster in October 2007. After two years with the Irish provincial side, he returned to his home country and signed with
Glasgow Warriors in March 2009. ==International career==