ugh, thank you JK, for this
Chelsea: In the end … you tell us that Neville is a professor at Hogwarts. What do-- Harry, Hermione, and Ron do?
J.K. Rowling: Harry and Ron utterly revolutionized the Auror Department in-- at the Ministry of Magic. So they-- I mean, they are now the consummate-- they are experts. It doesn't matter how old they are or what else they've done.
So Harry and Ron lead the way in recreating the new Auror Department. And by the time-- 19 years later -- I would imagine that Harry is heading up that department, which is not corrupt in any way. It's-- it's a really good place to be. And Hermione … I think she's now pretty high up in the Department for Magical Law Enforcement.
Where I would imagine that her brainpower and-- and her knowledge of how the dark arts operate would really give her a, you know, a sound grounding. So they're all at the ministry but it's a very new ministry. They made a new world.
but then I was reading her web chat interview she did through the publisher and she says that Ron goes on to work with George. Confusing. :/