Nonsense, he has a master's degree and he's Thai. I am in a similar situation and he will get a work permit without issue. He could also work in any university here with his qualification.
Coupled with the fact that he clearly has a master of the English language and one can also assume he speaks Thai, there will be many opportunities for him.
Unfortunately, they will try to pay you a Thai salary and not one that a foreigner would usually get. However, over time, the salary will rise and you get all of the government employee perks.
Good luck.