Rutgers IS the industry school, Colaizzi historically lead a willing faculty into an extremely cozy relationship between PhRMA and Rutgers with both sides highly benefiting (to the exclusion of basically every other school but Temple and URI). It's pretty-closed shop for Piscataway.
Yeah, those days are over in terms of the 'cushy' job. Most PBM's implement Six-Sigma-lite personnel practices that get rid of their low performers every year (less survival stress that ChalupaBatman's supervisory work at CVS, more on par with academia's publish or perish system). There's a couple of divisions To the op, there's several good options even though I don't have specific advice for USP (I honestly don't have contacts there as they are more traditional as LNSean points out):
1. (Minnesota internal knowledge) I would ask for an appointment to talk with William McGhan on your faculty about industry and academia. He's actually well-regarded for having a comfortable relationship with pharmacoeconomics. If you can work with him on a PharmD paper, that would be good. If you're feeling really ballsy, while there, ask him for an introduction to Albert Wertheimer at Temple (if he still accepts appointments from students) on grounds that Albert was THE trainer for most of the PhD leaders in the business and is someone who has a strong relationship with both academia and industry, and you want to know how to make both of them work.
Before you go to McGhan and definitely Wertheimer's office, get your act together about why you want to work in PBM (the workstyle is great, but there are different divisions there that deal with drug information, informatics, regulatory, etc. The ones that verify scripts (prior auths) and do formulary management/utilization review are being eliminated in favor of contract staff.)
2. Talk to your experiential education coordinator to request assignments in King of Prussia for your elective and admin rotations and make sure they are in PBM's/industry. King of Prussia is the HQ for many of the PBM's R&D divisions. Consider also trying to get an experiential education rotation at a "Contract Research Organization" or at Penn's or even USP's department for something called "Research in Practice" (McGhan may be able to help you with that).
3. If you're really wanting to work at this, consider working on your own time or on an elective where you work up a paper for ISPOR Boston next year.
http://www.ispor.org/meetings/meetcalendar.aspx
The standards for submission acceptance are less politicized than APhA or ASHP (you don't need to rah-rah the profession or come up with yet another pharmacy clinic practice model for ISPOR), and it's much more than both in terms of introducing/applying for jobs. Quite a number of my colleagues were hired outright at the conference and a number of my fellows as well accepted outright offers there (who didn't have their heart set on the feds). DIA 2007 in Chicago is a less industry heavy but more FDA attended conference.
With the exception of utilization review and prior authorization handling (which as stated above are getting eliminated), you're probably going to have to get postgraduate sort of experience. Don't worry about it though, if the PBM likes you, you'll do it on company time and dime. McGhan himself was sent to Minnesota on APhA and I think J&J's dime through the fellowship route.