Mathias Johansen received his first rigorous musical training with Ekkehard Hessenbruch. He began his academic studies with Wen-Sinn Yang in 2005, which he carried on with Troels Svane in 2008. In 2011, he became a master student with Frans Helmerson at the Hans Eisler music conservatory in Berlin. He was admitted to the graduation exam with Conradin Brotbek at the Music Conservatory Stuttgart in 2014. His artistic development has been supplemented by master classes with David Geringas, Wolfgang Boettcher, Jens Peter Maintz, Daniel Müller-Schott, Gustav Rivinius, Wolfgang Emanuel Schmidt and Natalia Gutman.
Mathias performed as a soloist with the Lithuanian National Orchestra conducted by Gintaras Rikevicius, in addition to soloistic performances with the Berliner Philharmonic. He also collaborated with such masters as Antje Weithaas, David Geringas, and Kalle Randalu for various chamber music projects.
His solo repertoire includes Dvorák Cello Concerto, Shostakovitch Cello Concerto No. 1, Tchaikovsky Rococo Variations, Elgar Cello Concerto, the Haydn cello concertos in C and D, and Saint-Saens Cello Concerto No. 1.
He is also a much-in-demand chamber musician and performs regularly at various festivals, such as the Podium Festival Esslingen, Podium Festival Iceland, Chamber Music Festival Moteleon, Zeitkunstfestival, the Austrian Styria Chamber Music Festival, and the León Chamber Music Festival in Spain. In 2014, he was on tour in Japan and Norway. He is a member of the Berolina Ensemble and the Archos Quartet.
As of 2016, he is professor at the State Conservatory of Vorarlberg in Feldkirch. His students have won numerous national and international prizes level and have performed live on Austria’s national broadcast.