I applied online, within 2-3 days later I received an email to complete an assessment. Then 2 days later I was sent an invitation for a phone interview. Phone interview consisted of a representative going over your work history, why ADP, etc. After the phone interview, they will set up a face to face interview, so be sure to answer the phone from a 1-800 number (it's hard to get in contact with them if you don't answer). Once your interview is set up, the coordinator will send you a preparation document for the interview, regarding the role you've applied for, basic interview questions, and qualifications for the position. STUDY the sheet and do your research on the company. You don't want to sound too rehearsed either. The interview probably lasted less than 2 hours. I interviewed with two managers in the department I applied for (1 in person and 1 through the phone). We talked about work history and behavioral questions. I later met with the VP for an interview the same day, to talk about why I believe I'm a good fit for ADP, my strengths, etc. Make sure that you think of some questions you want to ask them during the face to face interview, they want you to come prepared with questions. I was told that I should hear back by the end of the day, and I did. I received an offer and was told that the background check can take up to a week. I heard back within 5-6 days with an official offer letter. ADP was probably the best interview experience I ever had because they were so fast and efficient with the hiring process. They kept you updated with everything.