I worked in a global tech company, big, famous, and global. My office was just down the hall from a vice president, was in meetings with them, did budgets and tech plan reviews. Gauranteed no secret FE at my multi-national company. Gaurantee there was a board of directors and auditor, and by law must be one for every corporation. Gaurantee that there is a complete org chart. Gaurantee many many study this chart, work with all organizations. It is inconceivable to me there could be any part of my company with any size and budget taht would be secret and no one would know or question.
Legal: accounting, annual report, etc, lie and go to jail with the college bribery people. Also, people transfer around, leave and new hire, have meetings where different departments tell each other what's up. Do the FE hiders eat on the company cafeteria? Any coworker ever say "What you working on?" There was a big secret project at my company, everyone knew what they were doing, and there were rumours of specifics, the ones I heard turned out to be true. Having enough people to do anything increases the chance of discovery, and having few limits your power.
Would love to see when the new vp of engineering goes into the meeting where he finds out FE and there is a secret part of his dept they did not tell him in the interviews that helps NASA hide FE. All in one meeting or break it to him gently over several meetings. In these meetings, will they show him D. Marble and Rob Skiba videos? When he leaves the meeting, will he be excited or disturbed or

or be able to calmly interact with co-workers as though nothing happened? When he goes home, does he say to his wife, "Honey what's for dinner? Nothing happened at the office today." If the man has a couple drinks, does he ever say things he shouldn't? Maybe some high ranking people hired get killed by NASA?
How much evidence do you have theat big corps hide FE? Anything other than thinking it must be so because the world is flat and full of conspiracies?