MITRE Senior Multi-Discipline Systems Engineer interview questions

Talked to an HR person. For the interview I spoke with 3 different people, two division leads and one person who was at a similar level to the position I was being interviewed for. The questions were conceptual and easy.

Got an invitation to a hiring event, where I talked with several different DHs, PLs, TLs, and HR personnel as to the type of work being performed and what my interests were. Kept in touch with a couple of individuals and came in for an interview about a month later. Overall process took about 2 hours, and even got a free lunch out of it. Got a call about a week later with an offer, and came on board after my 2 weeks notice at my previous employer.