The whole idea of building manufacturing in the US is to employ Americans. And if they can't find enough qualified Americans, it's because WAGES ARE TOO LOW.
The problem isn't wages. The problem is that Hyundai people have the knowledge about how to build a Hyundai production plant, just like Americans will go abroad working for American companies.
The Hyundai HQ is in South Korea, you can expect that they will bring people from their HQ to oversee their operations and to do knowledge transfer. It is common sense.
Sure, but that doesn't seem to apply here whatosever. 475 people isn't 'knowledge transfer.'
Honestly this could be a simple as "all the docs for how to do this are in Korean, and doing the job effectively involves communicating with HQ in Korean."
It can be, the plant just opened and they hired thousands of people.