==Discography=====Savatage======Doctor Butcher===* 1994 - "Doctor Butcher"===Jon Oliva's Pain======Trans-Siberian Orchestra===* 1996 - "Christmas Eve and Other Stories"* 1998 - "The Christmas Attic"* 2000 - "Beethoven's Last Night"* 2004 - "The Lost Christmas Eve"* 2009 - "Night Castle"===Solo===* 2013 - Raise the Curtain===Guest appearances===* 1996 - "WWF Full Metal" (lead vocals on "We're All Together Now")* 2001 - "Symphony of Live" by Rough Silk (vocals for the part of God on "Lucifer")* 2002 - "Xiled to Infinity and One" by Seven Witches (lyrics and lead vocals on "The Burning (Incubus Reprise)")* 2005 - "W.A.R.P.E.D.
=== Doctor Butcher ===* 1994 - "Doctor Butcher"=== Jon Oliva's Pain ====== Trans-Siberian Orchestra ===* 1996 - "Christmas Eve and Other Stories"* 1998 - "The Christmas Attic"* 2000 - "Beethoven's Last Night"* 2004 - "The Lost Christmas Eve"* 2009 - "Night Castle"* 2013 - Raise the Curtain* 1996 - "WWF Full Metal" (ведущий вокал песни "We're All Together Now")* 2002 - "Xiled to Infinity and One" by Seven Witches (лирика и ведущий вокал песни "The Burning (Incubus Reprise)")* 2005 - "W.A.R.P.E.D.