Member:
NA- Desperados - keyboards  
NA- Rough Silk - keyboards  
1997- Roland Grapow - keyboards  
1998- Axel Rudi Pell - keyboards  
2006-2009 Eden's Curse - keyboards  
Studio musician:
2008 Holy Moses - keyboards  
Live musician:
2007- Therion - keyboards  
Guest musician:
2003 Masterplan - keyboards  
2006 Domain - keyboards  
2008 Holy Moses - keyboards  
2011 Wolfpakk - keyboards  
2013 Avantasia - organ