Some in upper management and HR at Booz Allen have a bad habit of lying. This is more so than I’ve seen at really any other company I’ve worked at, so it’s worth mentioning. They will absolutely lie to you when trying to recruit you. They’ll tell you about bonuses and fast promotion. It’s important to know that it is company policy that no one below senior associate gets any bonuses, regardless of what they tell you. They have this vague concept called the ‘People Model’, but in reality it’s just a bunch of false promises; no two managers give the same definition of it.
Booz Allen is currently in this weird stage of deciding if they should be more than a government contractor. They spend a lot amount of money (which they get from huge gov't contracts) in anything that has the word ‘innovation’ and in creating products that don’t have a legit chance of selling. That money could be better spent elsewhere; for instance, the firm wonders why their commercial arm isn’t getting any legs, but it’s really because they don’t bring in any legit rainmakers. You can’t ask government workers with no industry connections to bring in commercial business - that’s not a good strategy.
Other than that: health benefits are relatively subpar. no bonus unless you're senior associate above, regardless of what they tell you.
Overall: If you’re looking for an extremely relaxed environment at a big consulting shop, I really couldn’t recommend any better place to work. If you’re fairly technical and want to challenge yourself professionally, I’d recommend looking elsewhere.