A name difference requires a supported identity explanation; it does not by itself answer whether the applicant meets the listed profession.
Separate identity from professional eligibility
Use authentic evidence to connect the person to the credential. Then assess the Engineer degree-or-licence alternative and actual duties. Canadian residence alone does not meet the principal’s Canadian or Mexican citizenship condition.
Set the advertisement beside the offer letter, the interview notes, and any written scope from the hiring manager, then mark each difference: title, seniority, listed responsibilities, tools, reporting line, and the share of time on each activity. Obtain a transcript or institutional letter stating whether the credential was formally conferred, the award date and the field of study, then compare those facts with the precise qualification rule for the proposed profession. The Scientific Technician/Technologist entry can work, but it carries its own conditions: theoretical knowledge of the discipline, the ability to solve practical problems, and a role that supports a professional such as an engineer. The second question is whether the offered position sits inside a profession the USMCA schedule actually lists, which is answered by comparing the written duties with the published entry, not by comparing job titles.