Pros
Leidos seems to be settling out finally after all the changes it endured post SAIC split. Although most of the company has evened out and has stabilized some of the business areas still function as if they are a separate entity from the whole company (different procedures, different standards, and generally want to do what they want to do).
Cons
After SAIC and Leidos split there were a lot of growing pains at Leidos including many firings, organizational restructuring, and general discontent with management. Although to their credit these things are expected when a major company splits or spins off. Management sometimes has a problem being forthcoming with their employees, part of that could be that they are in the dark as much as the employees. Overall a good company to work for, but with all the changes and fluctuation in the last few years it seems that Leidos's future is uncertain. As an employee it was hard to know whether my job was going to be there tomorrow.