Apropos of nothing, many engineering firms are now empolying librarians (or archivists, as they seem to be referred to).
Most have been stung by an inability to retrive design or early project information, which they thought they'd solved merely by 'going digital'. They were badly wrong.
Anyway, although you're keen to get out of the corporate world I thought I'd mention it - some of the jobs look pretty interesting and the pay is quite good in places, and I can only see it getting more and more important. I am referring predominatly to digital curation, which I assume is part if most librarianship nowadays in any case.
eta: apols for spelling. Either my keyboard's on its way out or I'm losing the ability to type.