NYC Rebel
...on the otherside of the pond
That is possible, but there are a couple of factors that might color your view
Your industry might be the problem. I know a lot of high level black engineering managers. I got my first job through a black Con Ed district manager. My brother in law is an engineering manager at my current company. One of my friends just got promoted to 1 level below executives and he is only 29. Does that mean there isn't a problem? No, but its not like that in every industry.
Secondly there are only so many high level positions. Most people don't become executives or even managers. Most people feel like they are overqualified for their positions. So to really establish a valid generalization you need a comprehensive study spanning different industries and regions.
Thirdly I'm not saying it is or isnt the case but its possible you have determined there is a problem without actually gather the evidence to say its the case. Its called confirmation bias
Since when has the experience of an engineer, one of the vaunted yet under populated fields in any industry, reflect the norms of the business world?
My wife has an engineering degree. Its a unique skill set and is a complete outlier.