I met an Epic recruiter at my university's career fair and gave her my resume. A few days later, I received an email saying that they wanted to set up a phone interview.
The phone interview was pretty straightforward - I was asked to explain my background, my interest in Epic, answer the ole "where do you see yourself in 5 years" question, and given plenty of opportunity to ask questions about the job and Epic in general. I had prepared quite thoroughly by researching Epic and developing a list of back-up questions to ask, so my interviewer and I talked for a long time. I'd recommend also asking questions throughout the interview if you think of them, so they know that you're actually listening while they're talking and can engage them in conversation, not just ask prepared questions.
About a week later I took the infamous Epic skills test.The math section is mainly composed of word problems/tricky "math riddles". There is a writing section which asks you to correct grammar mistakes (fairly easy, this is something you could study for), a logic section (analogies and puzzles - take your TIME to think through the puzzles and don't panic!) and a programming section where they teach you some basic concepts of a language and you answer questions based on their mini-lessons/examples. My understanding is that if you have programming experience, the section should be a breeze. I have zero programming experience, and the questions got increasingly more difficult, so by the end I was really struggling to come up with answers.... but I guess I did well enough to pass.
A few days after I took my skills test, I received an email saying that they wanted to bring me in for the on-site (final round) interviews. They flew me into Madison and I had dinner with a couple of Epic employees along with 4 or 5 other job candidates the night before my interview. This was a fun, informal time to get to know some people from Epic and ask them pretty much anything we wanted to know about the company and the area.
The on-site interviews: First I attended a presentation where Epic software was introduced. I then had a one-on-one session with a current PM/IC who talked to me specifically about what the position and answered my questions about it (this was not an interview.) Next I had a case study. They gave me and another candidate a case to read, and after what felt like only 10 minutes (but was probably longer than that) the interviewer came back into room to ask us questions about the case. She asked the same questions to both of us, and we switched off giving her our answers. I don't think the case questions were difficult; they just required some common sense and decisiveness. It somehow morphed into a full-blown behavioral interview, and she asked lots of "give me an example of a time that you....." questions. After the case study was over, I immediately went to another behavioral interview. This was non-stop behavioral questions for about half an hour and it was somewhat exhausting, especially since it was right after the case study. I highly recommend preparing for this by thinking of your major accomplishments and difficult situations at work/school/activities that you've tackled. Afterwards, I went to give my 10-minute presentation that I'd prepared. There were just a few Epic employees as my "audience" and they were very friendly. Make sure to pick a topic that you find enjoyable and comfortable to talk about. Have fun with it!
After lunch we were given a partial tour of campus, and then I had my HR interview (last interview of the day.) This included a few more behavioral questions, and some questions about whether or not I'd be willing to re-locate, the salary I was expecting, etc.
I received a call one week later from my HR person with an offer.