He began his career as a jazz musician in the Nord-Norsk Ungdomstorband at the end of the 1990s and launched his own project "Ole Morten Vågan Projekt" on tour for Nordnorsk Jazzforum in 1999.

[2] In 1999 he formed the quintet Motif, together with Atle Nymo (tenor saxophone), Mathias Eick (trumpet), David Thor Jonsson (piano) and Håkon Mjåset Johansen (drums), where he composes the main part of the repertoire himself.

[1] As both a bassist and composer, he has worked at the intersection of improvised and notated music, and in 2011 published his seventh disc with the aforementioned MOTIF, to critical acclaim.

In 2009 he wrote an hour's music to a tentett, which besides Motif's permanent members, included Mathias Eick, Mattias Ståhl, Ola Kvernberg, Håkon Kornstad, and Petter Vågan.

Vågan received the DnB NOR award at Kongsberg Jazzfestival i 2009,[3] and came back the following year with new music, this time for a band consisting of influential musicians from the European improvisational scenes: Axel Dörner and Rudi Mahall (DE), as well as Fredrik Ljungkvist and Jon Fält (SE).