The biggest problem a lot of engineers face is that a lot of companies don't want to train us in simulators.
EU operator I know does just that, engineers have a sim conversion for ground running, about 4 hours between 3 people, brought up a lot of good issues.
Able to practice things like brake failures and engine fires, helped people understand some of the risks, including using too few people. You really need someone in a front seat who is not doing the test or the readings , just there to be the safety net.