I had a friend whose dad was a genius in the sense of a really, really high IQ. He had two PhDs (physics and... chemistry? engineering?) and was an engineer. But while he'd written some significant papers, etc., in general he was just, you know, an engineer. You need really smart people in those types of jobs, so he did well, but he just did his job and there wasn't really a place to stand out just because of being *that* smart. At a certain point, it's just not important whether, say, your IQ is 130 or 160, both of you are able to do the work, do it well, and feel satisfied with what you're doing.
I know somebody else who was reading well enough at about age 4 to impress college professors with his analysis of classic literature. But he's working in a blue-collar job that doesn't require a college degree (which he doesn't have). He does, however, excel at his chosen career. He flew through the education (trade school) parts, does a fantastic job, has been asked to teach, has been asked to take on more teaching, special recognition, all sorts of stuff. He makes a fantastic salary that is far more than most college graduates could expect. No idea what his IQ is, but while his path is a little unusual for what one would usually think of as a genius type of thing, he has made a success of it through both ability and hard work.