Not necessarily. Identify the actual legal arrangement and the capacity in which the person signs.
Make the parties explicit
A parent-company officer may sign a document concerning another entity, but the records should accurately explain that relationship.
Where the role plausibly fits a listed profession that allows an experience-based alternative to a degree, identify exactly what that profession's own rule requires and document the applicant's experience against that rule, not against a general trades reputation. At every extension, and in substance at every re-entry, the question is whether the person before the officer is a citizen of Canada or Mexico engaged in prearranged professional work in a listed profession, holding whatever that profession's rule requires. TN status requires actual Canadian or Mexican citizenship; permanent residence in Canada does not itself establish eligibility, regardless of how long the person has lived there or how strong the job offer is. An officer who sees a letter promising floor duties, with no state licence and no certification, has reason to question whether the professional arrangement is genuine. The employer letter should identify the work, pay arrangement, location, and anticipated period so that the professional assignment can be assessed against the listed occupation rather than against a broad job title.