The hiring process at Mathematica takes an average of 4 days when considering 1 user submitted interviews across all job titles. Candidates applying for Finance Administrator had the quickest hiring process (on average 4 days), whereas Finance Administrator roles had the slowest hiring process (on average 4 days).
3 step process, with work sample. HR recruiter, hiring supervisor, and then a longer interview with 3 separate people. Asked a lot of your basic personality questions, and some about my research experience.
Initial screening phone call with HR. A separate one on one with hiring manager. Then a final round with about 8 staff in adjacent roles. Mostly involved behavioral questions, some about policy interests.
I applied online. I interviewed at Mathematica (Washington, DC)
Interview
Phone screen plus in person. In person met with potential supervisor, senior leader and peers. Interviews were conversational and interviewees were approachable. Overall, good experience. Had a chance to ask questions of my own.