I'm wondering about web accessibility if it has a demand in big corporates as a job?
closed as too broad by kontur, greenforest, Charles Wesley, ChrisF, rk. Oct 15 '13 at 13:20
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Not sure about big corporates (as you asked in your question), but I expect you to have more luck with government organizations. Governments are usually required to make their websites accessible for as wide an audience as possible.
Among corporations that sell products to government agencies, web developers who have knowledge of web accessibility will be favored over equivalent developers without web accessibility experience. Frequently governments require any product they purchase to be compliant (in the US it's Section 508 compliant).
Now, if your question is whether the position "Web Accessibility Expect" is in high demand, that's a bit more niche. If a corporation wants to have a company-wide Accessibility policy and guidelines, they might have an Accessibility team that is responsible for coming up with those policies, checking their products to insure compliance, and working with product developers on problems they encounter while making their product accessible. If you wanted to be the "Web Accessibility Expect" on such a team, you'd need to be intimately familiar with HTML5, WAI-ARIA, Section 508, other web technologies (I'd obviously not get this job) and be able to assist developers who are using them.
So, having web accessibility knowledge is probably going to bump you up in the pile of devs if the company wants to sell to a government agency but getting a job just doing web accessibility is something you'd have to search out with a bit more effort.
Note: I'd link to the section508.gov site but it's down right now.