They started music seriously pretty much after getting out of studies, so they had few time to get a big job, but what Keaton says makes sens. By the way I think 5 band members have a diploma, but I don't remember who and what . If someone could please answer this subtile question . I think Mike and Joe had one in arts and Phoenix in communications, but I'm not sure...
None of them had jobs. They all graduated college and were in bands before they all came together as Xero/Hybrid Theory.
What I know is that Mike did get an art college diploma, but Joe didn't finish his education in there and I think Chester had taken a philosophy course or something in the university, but never got a diploma either. It means that 2 out of 6 guys dropped out of the college/university. I really don't know much about their previous jobs, except for the fact that Chester was in "Grey Daze" & Phoenix in "Snax". Plus, Mike did some designs for the other band's album covers.
i think Brad has a degree/dimploma in Law.. and Mike in arts.. but thats all i know... but i think Joe helped out in a film for some costume design or something like that.. not really sure...
Chester is the only one without a university diploma. I read it in a SPIn magazine article. Read it here: http://www.lpassociation.com/?p=magz