For me the process was quick and easy. I had a phone interview first, the next day was in person with the HR recruiter then two team leaders and I was pretty much hired on the spot (I had to drug screen and background check that day in order to move forward). They hire in groups and if you're good they'll typically hire you right away to get you into the earliest training group. Sales background is important. They ask a lot of sales questions and customer service questions. Any type of degree helps too, though they will ask why you aren't working in your field if your degree isn't related.