Pros
Certain well-managed private contracts truly provide a decent opportunity to grow your skill set and connect with client needs. You may get lucky and meet a few dedicated and incredibly intelligent individuals.
Cons
Requirement to submit to 24/7 background investigations regardless of position or access-level with an additional 24/7 credit and financial distress monitoring investigation required if you obtain any level of secret clearance (required for many positions at BAH) or become a senior level associate or above. This is not done for the government, but by other companies contracted by BAH to report the information directly to them. File for divorce? Booz Allen now knows. Take out a loan to pay for medical bills? Booz Allen now knows. They also, as an unexplained policy, will keep any information they gather about you for 7 years after your employment ends. This is the maximum amount of time allowed under the law and is by all means optional. They could just as easily destroy the information upon your resignation. This is also all being contracted to a private investigation firm with long histories of leaking data they've collected. Extremely underpaid compared to other positions in the same job market. Management does not seem to listen to complaints about job security concerns. They will flatly lie to you and tell you that no one will lose their job if a contract expires and then proceed to lay people off once it does.