Does anybody have any good recommendations on a backpack/briefcase combination?

In my work I go to a boat load of committee meetings and despite the laughable assumption that computers decrease paperwork, obviously the opposite is true. Right now I carry around a Jansport backpack that suits me, but when I stick papers in it they ultimately end up wadded at the bottom of the backpack crushed under my laptop, ipad, phone, and whatever else I throw in there.

What I’d like is something like a compartmentalized briefcase where I can keep things in reasonable order, but since I always walk the stairs at work, I’d like it be convertible into a backpack.

Ideally, I’d like it to be synthetic—i.e. not leather.

Can y’all help?