When you work on major IT projects for big enterprises, you get to pick up a lot of non-technical insights. Just by joining in on conference calls, you'll hear subject matter experts speaking about their piece of the project.
You get to know people, what makes them tick, and how to talk to them.
Then you can use that knowledge, the language they use, to meet new people in other companies.
And, because you're already trusted for your technical expertise, you're already in the door. Perfect chance to pivot your business to a new area where you can help the company with their expensive business problems.
That's basically my story: IT infrastructure guru who has worked for big banks and manufacturers. Now I'm moving my service into business advice, and teaching other technical people how to do the same. It's easier than you think.