The account should reflect the actual role. Omitting expected work would undermine rather than resolve the eligibility question.
Assess the mix honestly
Explain what the applicant does and how responsibilities relate to the proposed profession. Do not replace a mixed position with an idealized role the employer has not offered.
TN eligibility depends on citizenship, a qualifying listed profession, the credential alternatives written into that listing, prearranged professional employment, and temporary entry. TN additionally requires Canadian or Mexican citizenship, prearranged professional work, and duties fitting that listed profession; Canadian permanent residence alone is insufficient. The record that usually settles the issue is the signed employer description read beside the exact credential evidence, not the title, a résumé, or an informal assurance. The omission a reviewer notices is narrower than most applicants expect: the letter never names the listed profession it relies on, so the duties float free of any category. A move that shifts the work toward tasks outside the listed profession, or toward duties that are no longer professional in nature, is a substantive issue and should be reviewed before anyone relies on the existing file. Counsel can confirm which route applies to the specific profession and whether the applicant's degree, transcripts, and experience satisfy it as written, rather than as it is commonly summarized.