No. The actual duties must fit a listed profession and the applicant must meet its particular qualifications.
Translate the work rather than the label
Ask what the role produces and which professional knowledge it requires. Do not substitute a preferred TN title for duties that do not support it.
The employer's letter must describe the position as an Engineer role with engineering duties — design, analysis, specification, inspection — and state the salary, the duration and the temporary nature of the stay. Where line-management duties are substantial, raise directly with the employer whether the position can be restructured to keep advisory work as the core function, with any operational involvement kept limited and clearly secondary. Resolve whether the person is a citizen of Canada or Mexico, whether the education or licence matches the specific occupation, and whether the employer controls a real temporary professional assignment. Before departure, the applicant should establish Canadian or Mexican citizenship, a prearranged position in a listed USMCA profession, and the precise qualification that profession demands; Canadian permanent resident status is different. For engineers, the listed alternatives include a baccalaureate or licenciatura degree or a state or provincial licence; actual U.S. practice authority is a separate question. Two further conditions apply regardless of which profession is chosen: the employment must be prearranged with a United States employer or entity, and the applicant must be a citizen of Canada or Mexico.