Ask HN: Who consults on tech content/documentation architecture?

I've got an early stages project going where I'm looking at how we might refactor/restructure some of our product documentation and information. Basically we have all the tech data/reference material anyone could ever desire, it's just not arranged and structured in the optimal way for how people use our software, nor is it indexed optimally for making it easy to answer questions.

Does anyone know of a firm or team that deals primarily with this sort of problem? I'm not looking for just a couple of tech writers to clean things up, I want basically UX experts for documentation and support content.

Any ideas?