Can't say towards ExpressJet. I did an internship with Independence Air and basically had a guaranteed job in any department, regardless of degree. However, those all went away when they went away. I still have a few friends from IDE at different airlines, but nothing that can get me a job. Was it worth it? Absolutely! I had a blast, and all the different departments and jumpseating was worth it regardless.

In terms of having a job, it's still worth it to put it on your resume. If you can get a job at expressjet, so much the better!

Good Luck!