Dewi started his conducting career back in 2010 where he was appointed Musical Director of the newly formed Melingriffith 2 Band, where they had a very successful 3-year partnership, during which the band won the National Chamionship of Great Britain (4th Section Finals) in 2011.

Dewi is currently considered to be one of the finest Principal Cornet Players of his generation, and to support this claim, he has won numerous “Best instrumentalist awards”, which include 4 at the Welsh Regional Championships in Swansea (2008, 2010, 2013, 2016), two in the Grand Shield contest held in Blackpool (2009 & 2010) and the “Best Soloist” award at the prestigious British Open Championships held in Birmingham (2013). Dewi has also been awarded the Harry Mortimer Best Principal Cornet Award at the Brass in Concert Competition at the Sage, Gateshead in 2011 and 2014.