The owner can fly whomever he likes on his plane under part 91. If he charges them to fly, then he needs some sort of Air Carrier certificate from the FAA (135, 121, 125).
A corporation can own planes, hire pilots as employees to fly those planes, fly anyone willing to get on, and operate Part 91; so long as they don’t charge.
it ALL boils down to this
is he operating under part 91 or part 135
MENENDEZ PAID - that we know