IamA Customer Service Rep for Healthcare.gov (aka one of those guys who tries to get you set up with insurace when you call in) AMSomeStuff!
I have worked at one of the call centers for just over a month. Unfortunately, I can't answer all questions because of confidentiality agreements. However, if I can legally answer I will!
Not the most definitive proof, but this at least shows I was hired. I would give better proof, but because I work at a secure facility I can't think of any other proof available. Sorry.
EDIT: I am glad you guys have so many questions. I have to go for a bit but I will try to answer these as I can!