Until 1996 Morten was a member of Uzi Suicide. He left this band to found Tristania in 1996 where he did the extreme male vocals, the guitar and wrote most of the songs together with Einar Moen. In 2000, he left Tristania, due to musical and social differences, and founded the new band Sirenia. He left Elusive in 2001 to focus on Sirenia.