Several bands have been formed by Mike Portnoy.
Michael Stephen `` Mike '' Portnoy -LRB- born April 20 , 1967 -RRB- is an American drummer primarily known as the former drummer , backing vocalist , and a co-founder of the progressive metal/rock band Dream Theater .	Dream Theater	Dream Theater	backing vocalist	backing vocalist	progressive metal	progressive metal	rock	progressive rock
He is a founding member of Liquid Tension Experiment , an instrumental progressive rock band featuring fellow Dream Theater members John Petrucci and Jordan Rudess along with bassist Tony Levin .	progressive rock	progressive rock	Dream Theater	Dream Theater	Liquid Tension Experiment	Liquid Tension Experiment	rock	progressive rock	John Petrucci	John Petrucci	Tony Levin	Tony Levin
He is also a founding member of Transatlantic , a progressive rock `` super-group '' featuring former Spock 's Beard keyboardist/vocalist Neal Morse , Flower Kings guitarist Roine Stolt and Marillion bassist Pete Trewavas .	progressive rock	progressive rock	Transatlantic	Transatlantic (band)	rock	progressive rock	Neal Morse	Neal Morse	Flower Kings	Flower Kings	Roine Stolt	Roine Stolt	Marillion	Marillion	Pete Trewavas	Pete Trewavas
