If I were the NSA, I would have sleeper "retired government contractors" (a.k.a. former employees / dual-employees) getting jobs in the private sector in critic

If I were the NSA, I would have sleeper "retired government contractors" (a.k.a. former employees / dual-employees) getting jobs in the private sector in critical infrastructure roles. None of these NSA guys have "Senior Cryptoanalyst, NSA" on their resume, they are get manufactured titles and positions representing some remote office in the Department of Defense. People take jobs after being in government service, so it would be very plausible for a "former government contractor" to take a job with Google, Microsoft or any other major technology company to get proprietary access to critical infrastructure. This would be much easier than the "brute force attack" method of hacking a network.