Biography
David Tollefson is an experimental guitarist whose recorded debut came as a member (along with Hypnos founder and solo recording artist M. Griffin) of Viridian Sun on 1997's ambient/experimental work, Solar Noise.
Perhaps surprising for someone so dedicated to testing the limits of sonic experimentalism, Tollefson has extensive experience in such relatively "straight" rock bands as Mind Garage, The Spinsters, Dangerous Penguins, CMOS, and too many others to list here.
Biography text from Last.fm, available under CC BY-SA.