I applied through an employee referral. The process took 1+ week. I interviewed at Promega (Madison, WI) in Aug 2015
Interview
The first contact was a phone interview with Human Resources and covered both general an personal questions. This was followed by a phone interview with a group manager who interviewed me more about my specific qualifications. The same week I received a 3rd phone interview, which was with current employees working in the group I had applied for.