The interview process varies. I was interviewed via telephone from the HR department and in person in front of a panel of three. I was offered a position the same day of the in person interview. The position I applied for was for environmental cost estimating. I was asked about procedures in conducting O&M in the field, how much it would cost to conduct O&M and unexpected maintenance. I have participated in the interview process and movement was much slower. Candidates sat through at least three interviews. Once interviews were conducted, notes were compared and a final decision was eventually made. It took a month at times to make an offer to candidates. Booz Allen does negotiate based on experience. If you are fresh out of college, pay seems to be more dependant upon what the degree is in. Engineers obviously start at a higher rate.