It's detailed more in the heritage foundation's Project 2025. The idea is to have an academy for grooming and selecting those political appointees. Essentially, they would have to pledge their allegiance to conservative values (and the president) and pass exams about what they should/should not believe in order to work in the bureaus. This would include vowing to believing climate change isn't a problem.

Of course, that's the short term "republican makes it into office" solution. Past that, to other presidents, I don't know. In my personal opinion, I think they're banking on never having to get there.