Pros
Well established and respected enterprise with broad range of career opportunities, both in the private sector and Government Contracting. Great and affordable benefits package, 401K (with employer match), generous leave accrual policy, decent communications from top-down.
Cons
Poor compensation rate, difficulty making upward or lateral moves due to the posting system. Recruiter department of HR are very close-lipped, lengthy (terminal) decision process, no contact if you are not selected. And the kicker, if your contract is cancelled or down-sized, GDIT will keep you hanging out for 30 days in order to not pay severance, and their idea of career assistance to re-place you within the organization is to send a list of open positions and it is up to the released employee to find, apply, interview, and hope for rehire. I can only speak for the contract I worked on, but it has the feel of the 'old-boy' network, and if you don't gel with or kiss up to the clique, you are pretty much left to flap in the wind.