No. Identify the actual employer and prearranged professional work, then assess citizenship and the exact qualifications. Commercial demand does not replace those conditions.
Explain the relationship accurately
A customer, employer and host can have different roles. Do not assume the party requesting a result is automatically the employing entity.
TN eligibility for a biologist generally rests on a qualifying baccalaureate or licenciatura degree; an adjacent-field degree requires assessment of its actual coursework against the profession rather than an assumed blanket exception, so compare the applicant's actual degree and area of study against that standard. The employer's letter carries the case: it should identify the employer, state that the position is an Engineer position, describe the engineering duties in concrete terms, give the salary, state the intended period of up to three years and confirm the stay is temporary. A signed statement of work or consultancy appointment shows whether the employer has committed the position to producing professional output on a live engagement during those opening weeks; a project programme shows on its face when that output falls due. What matters is whether the arrangement still shows a qualifying listed profession, an accepted credential, and prearranged professional employment for temporary entry, and whether any ownership interest raises the self-employment bar.