[SimonPStevens]

Have you tried working freelance? I've had several big projects in the past where we've had accessibility requirements to meet and it always involves training testers and developers in the tools. I'd have happily paid a someone to consult on best approaches, run the tests, maybe train a few people to keep it going.

[blindprogrammer]

Couple of people in here already have suggested I start an agency that consult accessibility, so I will start that soon. I have to get couple of classes on accessibility to check off some formal education checkmark, because a lot of people won't take me seriously if my professional opinion isn't backed up with some sort of formal education. Even though, I use screen readers daily to write code, to read articles, even to do some light editing with iMovie since I have few remaining eyesight.

[SimonPStevens]

The formal certificates will help in some situations, but don't assume you need them for everything right from the start. Speaking for myself, I would have happily hired a consultant with the experience of being blind themselves over anyone with a certificate.

Another thought is that for one of the projects I had the accessibility requirement came from the UK government. It was a project being used in a public service department and it was a requirement for them that every bit of software they purchased was accessible. If you're in the UK you may find the public sector is a good place the look.