TN requires prearranged professional employment, so who the employer is matters. A recruiter can introduce the parties and coordinate paperwork, but the arrangement still needs a clear employing or contracting party and a genuine professional position. Where a staffing agency or third-party placement is involved, that structure should be reviewed by counsel.
Be clear about who the employment is with
Placement through an agency is not automatically a problem, and not all contracting structures are prohibited, but the file has to show who directs the work, who pays, and where the professional services are supplied. A support letter naming one entity while the contract names another invites questions. Settle the structure first, then have the documents describe the same arrangement in the same terms.
TN is open to Canadian and Mexican citizens who have prearranged professional work in an occupation listed in USMCA Appendix 2 and who hold the degree, licence or experience that the specific entry demands. Officers ask the professional about their duties, credentials, employer, and intended period. The principal separately needs Canadian or Mexican citizenship, prearranged work in a listed USMCA profession and the required professional qualification; permanent residence in Canada is a different fact.
Yes if the professional agronomy work is the substance of the position and sales are incidental to it.