The first step is to apply online. After applying online, I was immediately sent a questionnaire that asked behavioral questions on how I would handle specific situations I might come across in working for the ACS. If you have leadership skills, or knowledge of the process, it shouldn't be too hard to figure out what they're looking for.
About a week after completing the survey, I was contact by a recruiter for a phone interview. The phone interview consisted of questions that were close to those on the questionnaire, along with more information about the position and salary range information.
A week later, I was contacted to do another phone interview with the regional manager for another phone interview. This one consisted of several similar questions, but also much more information about the position and what it would entail. This interview last about 45 minutes. At the end of the interview, the manager asked me to come in for a "meeting" to meet her and other who worked in the office. This meeting took place a week after the phone interview, and last about an hour.
I received an offer for the position later that same day.