Not OP. I guess the best way to protect any job is to make yourself irreplaceable. Maybe a junior position could be filled by a foreigner at less cost for the c

Not OP. I guess the best way to protect any job is to make yourself irreplaceable. Maybe a junior position could be filled by a foreigner at less cost for the company, but if you're filling a more important position, for which there will be less competition, it will be less likely that you'll be replaced.