No, it means that the role will exist forever at that company, as far as anyone knows. It means the company has no plans to ever eliminate it. You may die or quit, but then someone else will be hired to do that job.
Of course, people can and do make mistakes. The fact that someone chooses to use a word to describe something does not mean that it's necessarily an accurate description. They may be lying, or they may simply have judged the situation incorrectly. How many startups say "we are the next Google"?