Comment by owenmarshall

Then the NSA finds a candidate that really knows how to secure inter-datacenter communications and gets them placed at appropriate positions inside the government or in collaborating private companies to build experience & a valuable network, with the long term goal of getting a job at Google. And if they really want in they place ten candidates in various companies.

The NSA can do this. They have the resources and the time to try. The only question is if they want a mole inside Google. Hell, I'd be shocked if large internet companies (Google, Yahoo, etc.) don't have agents from foreign and domestic intelligence agencies working there right now.

Betting on a companies hiring process to catch agents of an advanced persistent attacker is betting against house money in Vegas. You aren't going to win in the long run.