Continuing Education: A Wizarding Option?

[alexpie at aol.com]

No: HPFGUIDX 37992

The other day, I was thinking about what my career might be in Potterverse.  
I sadly realized that it would be much as it is in this one--that is, editing 
the likes of Gilderoy Lockhart.  I then began to wonder if graduate education 
exists in Potterverse.  That is, if Ron decided to be a librarian and 
Hermione decided to be a nurse, what would they do?  Obviously, Nurse 
Pomphrey has had greater education that than which is offered at Hogwarts, as 
has the librarian (sorry about lack of name, books inaccessible at the 
moment).  In addition, aside from the DADA teachers, most of the teachers at 
Hogwarts seem to have chosen teaching as a career (particularly McGonnagall). 
 Surely when they graduated Hogwarts, they were not qualified as teachers at 
seventeen!
  Any thoughts?
  Cheers--
   Ba, of Ravenclaw (and what else could an editor be?)