sudo is used to give people the right to run a specific command as a different user -- it doesn't control the rights inside some other program. (Given that you're in "security", I would assume you knew this).

As Security, I am allowed to see anything, but change nothing

If you're allowed to "see anything", why do you think you need special permission to see if a file exists? Do you know what "anything" means? Perhaps you use a different meaning that the rest of the world?

and so as my standard user, am told files do not exist that really do.

Are you sure noone is trying to pull you a leg? "Files that do not exist that really do" sound like a prank -- like what they try to pull on newbies in a woodshop: sending them on an errand to get a square hole drill.

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