At my last sfw eng job we had two full time writers mostly working on documentation and legacy system diagrams. These people were both contractors, but were emp

At my last sfw eng job we had two full time writers mostly working on documentation and legacy system diagrams. These people were both contractors, but were employed full-time there before I started and after I left (4+ years.) Like the other poster they may have come from writing firms or just done individual contracting. Maybe contact some head hunters?