Forget any internal training.
It’s not what you know, it’s who you bl*w.
You need to be on a succession plan before the age of 32.
If you’re not, you’ll never get the leadership experience required to advance.
No succession plan means working yourself to death, missing out knowing your kids, divorce, and elder care.
A succession plan is a way to curtail infighting. For instance, I was a tech aide when Jeff Lavers was a low level salesman in the old dental products. Never made an impression on anyone. If I rose up the ranks and got to a level I could hire executives, I would never have hired Jeff Lavers.
Same for Roman. He had to surround himself with external hires. If he hired internally, he would have been exposed and cancelled long ago.