I applied online. I was emailed about an interview slot, and interviewed by the Human Resources Intern Manager. It was very relaxed. She then told me she would transfer my resumé to the Denver office so that I could have an in-person interview. However, they are a little disorganized, as I was not interviewed in-person. Another person (my current manager) called me for an interview. He said he was unaware of my first interview. So we had a little phone interview again. He just asked me what my background was, what my plans are, and told me a little about Zayo and the telecom industry. A couple of days later I was called and told that I had the job. Super relaxed and friendly. So no in-person interview for me. The interview process was very simple.
Side Note: The first interviewer told me it would take a few weeks or maybe a couple of months before anyone contacted me for an in-person interview. However, the entire process took less than a month.