Amy commented a while back:
If I were to enroll in school to be able to take internships, how would one go about getting an on set internship? I’ve watched a few credits that have “art department intern” and other credits listed but I can never find these through production company websites or other job search engines.
Internships vary from studio to studio. Some studios have them. Others don’t. Your school should have a counseling office or an internship office or an industry relations office that will get the inside scoop on studio internships. If your school doesn’t have that, then you should talk to someone in the administration about getting those resources. They shouldn’t be robbing you of thousands of dollars without offering you some connections to “the biz.”
Keep in mind, an on-set internship is by no means a glamorous position. It could involve a lot of late nights for (as we’ve learned) no pay. Moreover, each department (and department head) will decide how much hands-on experience they want to give their interns. In some cases, you might be down in the trenches with the PAs. In others, you might be sitting on the sidelines, getting coffee and bagels but not really getting your feet wet.
(If “mixing metaphors” were an Olympic sport, I would have all sorts of gold trophies.)
Looking for an internship through production companies or job sites is a complete waste of time. Production companies don’t hire production crews, so they would be of almost no help to you. And job sites (such as the UTA job list) will give you plenty of access to office internships at agencies and the like, they won’t help you get within ten miles of set.