> Highly skilled early- to mid- career engineers, technologists, and innovators join NASA for focused term appointments, typically 1–2 years with the possibility of extension, to solve complex...

is somewhere in that word salad. I think it's an internship?

I guess what they want is a short term resource which would typically be a contractor or consultant but maybe they have to hire an FTE. So they're saying it's going to get real boring after year 2 so we expect you to leave. Sounds like a good deal for a new grad, bottom bullet on the resume would be a year or two at NASA.

Maybe a visiting scholar kind of thing.