Geir Davidsen is a musician living in Tromsø, Norway. He is exploring the timbre and instrumental technical possibilities of the euphonium. Through development of new playing techniques, he contributes in providing new musical material, and further exploring this in collaboration with composers and musicians. In 2009 he finished his fellowship in the National Norwegian Artistic Research Fellowship Programme with his project Wikiphonium.
Davidsen is currently an Associate Professor and Vice Dean of Research at the Faculty of Fine Arts at UIT, The Arctic University of Norway.