Rock vocalist, songwriter, and musician who has fronted the group Tool and A Perfect Circle, as well as Puscifer.
He attended United States Military Academy Preparatory School. His first group was Children of the Anachronistic Dynasty.
He has worked as a winemaker.
He has a son named Devo H Keenan.
He appeared on the cover of Pop Smear Magazine for the May/June 1999 issue and portrayed Charles Manson as part of a photo essay.