Mattias is born 1971 in Oskarshamn, Sweden and lives in Stockholm. Have the latest 15 years performed at stages around Sweden and elsewhere, focusing on jazz and improvised music. Released two album of his own with his former quartet Ståhls blå (Ståhls blå 2001 and Schlachtplatte 2004), which achieved great attention from reviewers all over the world. He also composed all the music for this group. As a sideman he contributes in a lot of exciting groups, from projects with the legend Georg Riedel to collaborations with the swedish indie wonder Emil Svanängen aka Loney Dear. Also: Cecilia Persson Quintet, Martin Küchens group Angles, IPA with Magnus Broo/Atle Nymo/Håkon Mjåseth Johansen/Ingebrigt Håker Flaten, Daniel Buner Formos Formo Tre&Metall and different projects with Trondheim Jazzorkester. Other groups where he contributed during the years are Eirik Hegdals Team Hegdal, Joakim Milders Takeaway, Lennart Åberg:s big and small orchestras, Nils Berg 5 (Jazz in Sweden Award 2007), Alberto Pinton Quintet, Yttling Jazz (with Bjorn Yttling from Peter, Bjorn and John), Fredrik Nordström Quintet (Jazz in Sweden Award 2002), Klaus Holm Kollektif. He has been the vibist of the swingtronica-duo Koop since 2001, touring all over the world. He has also played with groups as Jet Set Sweden och Sven Berggrens Alea. He recieved the Swedish Radio Award 2002 as newcomer of the year for his album Ståhls blå.