I'm just riffing here but this doesn't seem like an insurmountable problem if you're willing to spend. Open up a training school, put the old guard in as instructors, get some good students, pay everyone big money. Build a lab reactor for hands-on practice, and pay to put students as glorified interns into under-construction and operating plants across the world. A few years later, you've got your people.

I don't mean to say it would be trivial but it seems like you could do the whole thing for a couple billion USD a year.