Soldato
Given the amount of work at SpaceX Elon has done and the amount of knowledge he has on all aspects of that company it's a stupid post, there's *many* sources to back that up as I already shared. Or you can just watch him speaking about rockets/SpaceX on Youtube for countless hours.
Knowing the general workings of his rockets considering he has worked there since it began is hardly surprising. He isn't designing the Raptor engines though, he didn't design the Merlin engines and he isn't writing the code that allows them to land. So talking the Tim Dodd for an hour is the least he should be able to do. That is such laymen stuff though, it seems complicated and in depth to us but we aren't rocket scientists. The idea he is SpaceX chief engineer in anything but name is laughable.