Career
Mathisen is a graduate of the Jazz program at Trondheim Musikkonservatorium (2004-2008). He is distinguished by his powerful, expressive play and is a force for all the bands he is involved with. He was first noted in the band Shagma in 2004, and also play within The Core together with Steinar Raknes, Espen Aalberg and Erlend Slettevoll, and within Zanussi Five including Eirik Hegdal, Kjetil Møster and Gard Nilssen, among others