> much of the commercial world is thinly veiled NSA work

While security agencies of various governments are on the buy-side on the "zero day" vulnerability market, majority of commercial "cyber" security companies are not dealing in "cyber weapons" and are not involved with NSA. There are plentiful examples of successful "white hats": H. D. Moore, Dan Kaminsky, Tavis Ormandy, Michał Zalewski, even our own Colin Percival and tptacek etc. You don't have to do work for government to play in this area.