Same situation, i needed one for work. Worked @ a social media management company...Facebook doesnt like "Fake accounts" so maintaining a real one for work, for the purpose of testing was something you needed to do.
Its a real pain in the ass, mixes personal and work way too much. I had a Facebook account already, and i still do, so i didn't mind too much....but i dislike the left overs its causes (installed apps, pages in my name, app keys in my name etc...although this was just due to poor management of these assets)
I receive occasional announcements and event invitations through FB groups. Sadly, this is the only way my company chooses to disseminate some information.
If you don't mind me asking, why do you need an FB account for work, especially when it sounds like you don't even use it?