Member:
1992-2011 Spock's Beard - vocals, drums, guitars  
2001- Nick D'Virgilio - drums, guitar, bass, vocals  
2001-2004 Mike Keneally Band - drums, vocals  
2010- Big Big Train - drums  
Studio musician:
1997 Genesis - drums  
2002 Lana Lane - drums  
2012 Mystery - drums  
Live musician:
2005-2006 Fates Warning - drums  
Guest musician:
2007 Jordan Rudess - vocals  
2007-2010 Big Big Train - drums  
2010 Aeon Zen - vocals  
2011 Neal Morse - vocals