Project-based contract work / freelancing? A good portfolio, some networking, and interviewing well could get you some gigs. Not being an employee would probably reduce any risk-averse corporate refusals.
I don't have a record, but it's never come up nor have I been given any hint that a background check was performed.
It's like penetration testing...no matter what kind of defenses a company has built... it takes is ONE opening to own all of it.