rocket scientist

To wit, one of the five people in my trail family—a 59-year-old rocket scientist who lives on the Space Coast and who we call Robin Hood—had barely run in two decades before he got on the trail.

Everyone can see the great value of having a bunch of rocket scientists and space explorers in your society.

But I am not sure they quite realize that when it comes to plain old intelligence, David is up there with any rocket scientist.

He used to work at NASA before he worked in finance, so he's literally a rocket scientist, which you need to be.