Pros
Depending upon the area/contract/business function you work in, the people on your team can be really great, however those types of teams have been very few in recent years.
Cons
Even prior to the company split of SAIC, Leidos has had countless struggles in operations and management. Unsuccessful contract bids, lackluster performance on contract wins and an ever changing of management staff should be an indicator that there are foundational problems within this organization. Within the past several years there has been a mass exodus of key personnel which should be an indicator for this company's instability, especially since the majority of these personnel chose to leave on their own and were not pushed out. All of this coupled with a work environment that can be challenging if not toxic at times, makes this a very difficult company to recommend to others.