If it hasn't affected your career (or your personal life etc.) in a negative way in the slightest you simply don't have it—the last D in ADHD is essential.
It is my opinion that it hasn't affected me in a negative way since I am satisfied with my life and I have had other issues that have had a much greater negative affect on my life.
I don't think you should chose a company or career based on a disease or a disorder. If you can live with it, which I think most can that have diagnosed ADHD, you could overcome whatever issues come up and still be successful.
I'll even give one practical example, I am usually all over the place and in the tech field I've used that to read up and learn a lot of different languages, tools etc making my skillset in tech very broad which have helped me tremendously in my career. I have a hard time to stick with one programming language and is never satisfied with one thing and switch back and forth on everything. That is both a negative thing and a positive one. I have a (really) hard time sticking to one thing and seeing it through but with tools like todolists and communities like WIP it makes it just a bit easier even if I always have the urge to pick up something else and restarting everything.
And yet there are things that seems not problematic but then they are. Relationships might be a problem because it gets boring much faster and also some people exhibit all-or-nothing. It's either full obsession or absolute ignorance.
Yet we all know that premature optimization is the root of all evil.