According to Wikipedia, Biff Byford works as an administrator for the Amadeus Orchestra sometimes- being on wikipedia I can't be certain that's true, but I once sang as part of a choir that recorded a DVD with the Amadeus Orchestra, so if it is true I'm pretty chuffed about it!
I know it might sound a little far out for a metal singer, but the Amadeus is all about giving young musicians a chance to make it as professionals, so I wouldn't be surprised.