It's worth noting that a lot of folks are going "But the guy they fired over the crashes was an engineer!"
Yep, he's definitely the one they fired. Of course, he wasn't the one who decided to cut corners on the MAX, that guy left before they started flying into the ground. He was an MBA.
So, to recap the CEOs (next post):
Stonecipher - GM > GE > MD > Boeing. (moved HQ to Chicago)
McNerney - PG > GE > Boeing (this is the dude who signed off on the MAX, lost out to Immelt at GE for Welch's job)
Muilenburg - started at Boeing as an intern in '85. He was 6 months in when the first MAX crashed and was the sacrificial lamb.
Calhoun - GE > Blackstone > Boeing