I applied online and got a call for a phone screening interview from HR in Pennsylvania. I was asked basic questions about my background, availability, interest, and preferred salary. Two and a half weeks later, I got an email from HR to confirm a time for another phone interview with the hiring manager and the director of the lab for which I was applying. They were on speaker phone and told me more information about the position. They asked more specific questions to see if I was a decent fit. They invited me to an on site interview, which was scheduled via an email I received a week after that call. The interview itself was about a week and a half after that call. I met with my potential supervisor and the lab director, the same people I spoke with on the phone. I also had lunch with a few members of the lab who I'd have been working with if I ended up working there. Long process, questions were not difficult, and everyone was very professional but it felt pretty relaxed at the same time.

Initial interview was with an internal recruiter for the company. Somewhat laid back, after that interview I was called to come in to have another interview at the site. I was interviewed by a panel of managers and senior scientists (5-6 individuals).