I think it was mentioned earlier, but I just don't think Klieman will be as successful at the next level as a head coach. Way too many basic game management mistakes. He is a great recruiter and has had the best players on the field in almost every game he's coached. That's not going to happen in FBS.
He'd make a good DC. I can't imagine him putting up with Fleck's circus but maybe staying near home would be a big enough draw to overcome that.