The standard interview process begins with a phone interview with the ADP/PDP recruiter. If things go well, you move on to a phone/Skype interview with actuaries within the company. After I made it through the first two interviews, I was flown to Chattanooga to participate in their Assessment Day.
The first night there was a networking dinner in downtown Chattanooga with the interviewers, some of the ADPs from the Chattanooga office, and all of the candidates (9 total). The next day consisted of 3 separate interviews (2 on 1) and a case study. The whole experience was extremely positive. The company is amazing, the HR process is streamlined and professional, and the interviewers were genuine and personable.