Whether a new or amended TN is required depends on the job duties, not the title, so it appears that your TN should remain valid. But you should speak with your

Whether a new or amended TN is required depends on the job duties, not the title, so it appears that your TN should remain valid. But you should speak with your company's attorney about what you should carry with you when you travel and how you should respond to questions about your job. The same is largely true for your PERM application unless possibly the promotion puts you in a significantly higher comp bracket or significantly changes your place in the company's hierarchy.