Apologies if this sounds patronising, it's not meant to!
Rather than going to the US for the experience of working, I think Pud meant to go there for "work experience" which is a system here whereby you go off to a business, school etc and experience what it's like to be a part of that, but you do it whilst still studying at your Uni/college...so I'm sure it'd still be a student visa as you've not graduated yet