Submitted my application through my school's career portal as they came to recruit on campus. I was contacted for a phone interview and I responded promptly, letting them know that I had a few outstanding offers and needed to expedite my process, but he didn't get back to me until I sent a follow-up email a week later. The recruiters for this rotational program are apparently in the program and were hired just the year before, so I cut him so slack. The phone interview went very well, however, I never heard from them again after that. No email, nothing. So unprofessional.