Pros
Great benefits, lots of opportunities to network. Great morale building activities like tbe hacker space, company trip to Kings Dominion and raffle for free concer tickets. They have lots of contracts and their resource management process had greatly improved to get you on billable work fairly quickly.
Cons
No matter how much they try to sugar coat it. The company is still a body shop. Number of billable people on a contract matters more than anything else to leader. Quality of personnel & proper fit to client are not really a priority. Especially on contracts that require clearances. A cleared c-player will get paid well and get the job, rather than the A-player without the clearance. This is very true in their Cyber Security Accounts. Training time is in addition to your required billable time, and business development (with ambiguous businesses objectives, and no ability to influence human capital policies) are also in addition to required billable time. Basically...they will take advantage of your time if you let them.