One hour technical presentation followed by 8 one-on-one 30 minute meetings.
Interview process was somewhat unfocused and subjected to unrealistic and vaguely egocentric expectations from engineers within research groups, i.e. expectation of Ph.D researchers creating their own functional systems rather than studying the effect of individuals in existing systems. The general feel was of an audience who had not well prepared itself for the interview process, nor read the single paragraph abstract I'd sent (as requested) in advance. Effectively, this meant that probably 80% of the questions I received were more relevant to an applied engineer.
Additionally, some unprofessional individuals in interview process. One interviewer asked what projects I'd like to work on. When I answered with an abstract theoretical suggestion, he dryly responded "do you really think we're going to do that at Draper?" Additionally, the same individual introduced me to several people by the wrong name (think "Greg" vs "Grant"). While this is personally awkward, the professional aspect is worse. Taken together with the technical talk audience's interest in facets of science only slightly tangential to the job posting's description, there seemed to be either a feeling of disinterest or dismissiveness by the individuals responsible for evaluating job candidates.