I applied through a recruiter. The process took 3 months. I interviewed at Westat (Rockville, MD) in Nov 2012
Interview
Interview was an all day process. Hiring supervisor read from a manual about the nature of the survey. I met with 4 different people who didn't really ask me any questions. Most of the interview process was an information session about the nature of work. The phone screener did most of the research on my abilities and references.