A sibling got a fellowship to the other NSA, the NNSA (National Nuclear Security Admin). Arguably, a much smaller though important Admin too. Their time in the fellowship resulted in mostly the same: Google pays more. So ALL of the last 8 years of fellows have gone off to private from gov.

The fellowship is really good money for grad school, about 36k, and you get good interning in the various national labs and good-ish mentoring (if you want it). My sibling was telling me about the dinners though, a real hoot. The old grey-beards from the pre-Apollo days really are clueless as to why all the fellows are leaving for the tech companies. They really just cannot understand why 'millenials' don't want to do the work. My sibling had to inform them that many (likely all) of the candidates are lying on their applications when they say that nuclear security is important to them. In addition to that, the ability to make more money, not have a black hole on the ol resume, and be able to talk about their job to a Tonder date are important. From what I was told, Tinder really blew their minds (pun not intended). I guess they don't get out from behind the fence much?