Pros
Up to the recent past, a company with a relatively stable past. Large corporation with the standard suite of benefits offered to employees. Part of the massive military industrial complex that represents a large portion of the private sector in the Northern Virginia area.
Cons
The entrepreneurial spirit is a thing of the past. What once was a horizontal organization with each program manager more or less in charge of his/her "piece of the pie", has now been reduced to a very vertical structure with activities such as HR, procurement, contracts, security, etc placed under the corporate umbrella and forced to operate in a "one size fits all" functionality regardless of the contracts it supports or the particular situation it encounters. In addition, the company has been in the process of dividing itself into two separate entities (SAIC and Leidos) since August 2012, with all of the difficulties encountered in doing that with some 40K employees.