Studio musician:
1991 Gamma Ray - backing vocals  
1993 Grave Digger - backing vocals  
1998 Grave Digger - backing vocals  
1999 Freedom Call - backing vocals  
2001 Freedom Call - backing vocals  
2002 Iron Savior - backing vocals  
2006 Saxon - backing vocals  
Guest musician:
1995-1996 Blind Guardian - backing vocals  
2001 Blind Guardian - backing vocals  
2002-2006 HammerFall - backing vocals  
2006 Blind Guardian - backing vocals