Hello.
I am Marcelo, a native Portuguese speaker from Rio de Janeiro, Brazil. I am a bachelor in English in the Universidade do Estado do Rio de Janeiro and, because of that, I believe that I have more than the appropriate level of profiency for this particular task. I have academic experience in translation, having worked as an intern for the translation office at my university during my undergrad studies. Currently, I am graduate student in American Literature, working on my masters.
I don't really know how long this document is, but, from your description, it seems like something I could get done in a couple hours, as per your request, and without much trouble.
I look forward to hearing from you,
Marcelo