Servisair will give you the training you need for the job, in a fashion, but I can tell you if you ever get to dispatch an aircraft you'll think it is the best job you've had, I miss the dispatch side of things, that's why I've gone for and been offered a Job as Ground Dispatcher in Dubai for DNATA/Emirates.
If you get to do it you'll love it,
Can't speak for MAN I'm from LBA but very similar operation.
Good luck with what ever you do.
CHEERS!!!