Pros
The benefits here are amazing. From the insurance, educational assistance, 401k matching etc. The work life balance is great and the wealth of knowledge and SME available is unbelievable. The access to industry leading professional journals and state of the art equipment is also great. Compensation is competitive and the MITRE institute training classes are very nice.
Cons
Personal growth here is very very slow. The way promotions are chosen is by the top %10 of AC Levels. Long story short, sometimes only 1 person overall well get a promotion per department based on your AC Level. Unless you are in the right department, work is scarce and you have to personally scavange for projects. MITRE was in the top 100 places to work for 10 years, then quickly fell.