Pros
Willing to hire you to work off-site and pay you to wait until you get building clearance and is very patient with issues or getting you on the team. Good benefits, good hours, friendly on-site staff, a lot of resources to move laterally in the company, a good place for networking, and pays well and does it utmost to give you reasons to stay onboard for the long term. Amazing work-life balance that has senior staff telling you to not to overwork yourself because they are cognizant burnout is bad for the long term and employee happiness means they will contribute long term and feel valued.
Cons
Most of the cons are related to the customer and how they make decisions that can adversely affect you while Booz is not necessarily able to control those factors given their status as the contractor that must bend to the needs of the customer. However, I believe this is remedied by the fact Booz will help you in finding new opportunities in the company.