Jansen attended the Jazz program at
Trondheim Musikkonservatorium (1995–98), and joined band like Ellipse,
Per Husby Quintet, "Trondheim Big Band" and
Søyr. After moving to Oslo, he has played within orchestras like "Radiostorbandet", med
Espen Rud Sextet,
Trygve Seim Ensemble,
Magni Wentzel Sextet, "Sharp 9", and musicians like
Christina Bjordal,
Staffan William-Olsson and
Håkon Storm. == Discography ==