Pros
Benefits were outstanding when I worked there, but they were cutting some when I left. They cut unlimited educational benefit though they left in place a common one of paying for classes if they related to your job. I think pension was cut for new employees but I don't know for sure. Salaries were competitive Engineering management came from engineering disciplines. Having had a different experience since, I see how wonderful it is to have management that you can discuss your work with New projects were very exciting and fun (but don't count on it for a first project there - there's high internal candidate competition for these projects). they used newer technologies and the problems were interesting. Because engineers were in a union, you got paid for every hour you worked. Met some very smart people there.
Cons
Old projects or highly political projects were a drag to work on. Some projects are 20+ years old and so are their technologies One project was highly politicized making it difficult to even leverage enough to accomplish anything. Foreign projects had very heavy government regulation burdens that made for a lot of dry, boring work. When I first went to work there, there was an ethics scandal every week at the highest levels. System Engineering wasn't very strong.