Graham was then invited to join Northern Irish band Therapy? in 1996. Graham recorded 3 albums and released a greatest hits album with the band. Therapy? sold over 2 million albums worldwide. While with the band Graham toured the world several times over.
Feeling uninspired by the musical direction of Therapy? Graham left the band in January 2002 and was immediately asked to tour with Irish singer/songwriter Gemma Hayes. After touring with Gemma Hayes for over a year ,supporting her Mercury Prize nominated album Night on my Side, Graham went on to record 2 albums with his own project called Halite, the first with Warner Music and the second was released on the bands own label. Halite have done lots of shows over the last two years including opening Slane Castle with the Red Hot Chili Peppers and Foo Fighters. They also toured with Feeder and The Thrills.

Graham has been kept busy drumming on albums with lots of Irish acts over the last 2 years. He has played drums with The Frames, David Kitt, Mundy, Alphastates, Autamata, Ann Scott, Josh Ritter, Jape, Pugwash, Fergal McKee (The Whipping Boy) and lots more. Graham has become one of the busiest recording and live drummers in Ireland also playing on countless advertisment jingles and jazz sessions.

The Frames,Gemma Hayes and David Kitts albums have gone to number one and several times platinum in Ireland.