Pros
The company is gaining more "brand name" recognition in the marketplace. They hold a lot of lucrative long-term contracts. And they will sponsor you to get a security clearance, which is a good asset to have. Right now the only thing keeping me here is a decent salary (by metro DC standards).
Cons
Poor management. Ineffective leadership. Nonexistent client relationship management skills. Headquarters personnel who show no interest in what people in the "trenches" at client work sites are actually going through. Most of SAIC's work is performed by highly competent people (and some very incomponent but well-connected people) with technical and business smarts. However the division managers and business unit heads, most of whom are salespeople with no real skills, pay little mind to what the on-the-ground contractors have to say.