No. Review the actual later duties rather than carrying forward a conclusion about different work.
Separate professional analysis from routine support
Ask the employer what the applicant would really do after delivery. The same project name can cover materially different responsibilities.
TN still requires citizenship of Canada or Mexico, a qualifying listed profession with its specific credential requirements, prearranged professional employment, and temporary entry. If the employer insists on describing an indefinite appointment, that is worth taking to counsel, because it may indicate the role is genuinely a permanent relocation and that a different route should be considered. Recheck the classification rather than assuming only the numbers changed: TN requires a Canadian or Mexican citizen performing prearranged work in a listed USMCA profession, with that profession’s own qualifications and no self-employment. An adjudicator compares described activity with the listed profession, not with an internal title, and a position that fills four days a week with fleet and personnel work will not become professional because a fifth day includes fieldwork.