By law, Thai Airways and its subsidiaries cannot recruit expatriates. Pilot of TG (Thai Group) must be Thai.
But Bangkok Airways, One two Go/ Orient Thai, Thai Air Asia have few expatriates. However there are more and more restriction imposed by regulators.
IAC- NPU, school at European standard, is currently recruiting Flight Instructors but the DCA has imposed a minimum of 600 instructional hours within a minimum of 1500 total hours