What accreditation is most important for cs jobs?
I was a hiring manager in the information technology industry before retiring to teach.  I don't think recruiters or hiring managers pay attention to accreditation; they're interested in the reputation of the institution.  As a beginning student, you want the best education available to you.

That being said, you might want to use accreditation as one of the factors you consider in choosing a school.  For a degree, as (possibly) opposed to some certificates, you certainly want a regionally-accredited institution.  The Close Cover Before Striking School of Programming is unlikely to seize the attention of hiring managers.

Program accreditation, as awarded by ABET and others, is an indication that the institution wants to "do things right" and to maintain and enhance its reputation.  I teach in the computing discipline, and it has been my anecdotal experience that program accreditation is one indication of a high quality program.  That is something you should consider.

Disclosure: I visited the nice Federal Express lady last week to send a self-study to ABET's Computing Accreditation Commission.