This guy’s name popped up in the Seattle Times article from almost Day 1 of the MCAS debacle. IIRC he left Boeing and went to Southwest, and proceeded to lie to them about the Max. To the extent there was a single person concealing information, it was him.
I guess him leaving explains why he's the only one to get the blame. Had he remained in the company, he could have blackmailed his way out, by threatening to bring down the whole club. By leaving, he painted a huge target on his back.