Please tell me this is a troll. I mean, I've seen some pretty incompetent people doing jobs they're not cut out for before, but I really want to believe this level of incompetence can't actually find jobs.
"Some people excel.... on well... giving good interviews."
The sort of interview that this guy would do well in is a poorly-conducted one. A simple question like "what does it mean to hash a password and why would one do that?" or "what is PCI?" would expose his incompetence.
Your assuming that the person interviewing him knew what the answer was supposed to be. It sounds like the incompetence goes all the way up and he was probably hired by a businessman who had no idea what PCI even is, much less the details of proper security.