I applied through other source. I interviewed at PPC (McLean, VA) in Jan 2011
Interview
Wasn't as rigorous or as thorough as expected. I interviewed with the director, a project manager, one or two senior analysts, a senior principle, each one at a time. It was more to get acquainted than to have a range of questions. They took me out for lunch. When I later got the job offer, it turned out that the managing supervisor was not the one I expected (although was one of those with which I interviewed). Apparently they had changed their minds on the reporting structure.