Start with the TN eligibility and application overview
Explain the interpretation the applicant performs
Identify the geological questions, data reviewed and conclusions the applicant is responsible for developing. Describe material field collection, mapping and other tasks honestly. A sophisticated map does not establish who interpreted the underlying evidence, while field activity is not automatically outside professional work. Connect each claimed responsibility to the actual assignment.
Establish the listed education
Geologist lists a baccalaureate or licenciatura degree. Identify the applicant’s actual qualifying education and its relevance to the work. A short mapping-software course is not another listed degree alternative. Degrees from institutions outside Canada, Mexico or the United States need evaluation by a reliable service specializing in foreign credentials. Separate any applicable professional-practice requirements from the immigration credential assessment.
Identify the employer and temporary work
TN requires Canadian or Mexican citizenship, prearranged qualifying professional activity and temporary entry. The employer may be U.S. or foreign. Services to a U.S. recipient solely owned or controlled by the applicant are prohibited TN self-employment; nominal supervision does not cure that ownership issue. A foreign business interest alone is not an automatic disqualification.
Identify which listed profession the duties actually describe
Each listed profession has its own stated qualification: a specific degree for some, a licence for others, and in certain cases a combination of a diploma with several years of experience. Canadian citizens seeking TN admission ordinarily present themselves at a port of entry or a preclearance facility with the supporting documents in hand, and no visa is issued in advance; alternatively the American employer files Form I-129 and the approval is presented on arrival. Managing people is not itself a listed profession, and the Management Consultant listing is a defined category with its own requirements, including an alternative route based on five years as a management consultant or five years in a specialty related to the consulting agreement. Depending on what actually changed, the practical response can range from no new filing, to a new employer-specific letter for the next border entry or extension, to a fresh determination of whether the post-merger duties still fit a listed profession. For Canadian citizens, the choice is ordinarily between seeking TN classification with supporting records when arriving for inspection and an employer's USCIS petition on Form I-129; the sequence depends on facts and planned travel. A letter that reads like a technician posting invites an inspector to conclude the work is not a listed profession.Compare the proposed week of duties against the listed profession before signing the letter. Compare the day-to-day duties with the wording of the chosen listing, then identify the record that proves each qualification: a diploma and transcript, a licence, or dated experience evidence where that listing permits experience.
Apply the specific credential rule for the listed profession
TN turns on the credential alternatives written into the specific profession's listing, not on a general notion of equivalency, so counsel should confirm which alternative the applicant is relying on before anything is drafted. Determine the listed credential path and the issuing institution’s location before deciding the evaluation scope. Each profession has prescribed qualifications and specifically permitted alternatives; experience is not a universal degree substitute. Where an education history is not straightforward, collect transcripts and credential analysis early rather than assuming experience can replace a required degree.
Sources reviewed 2026-09-08. This guide covers a preparation focus; it is not an individual eligibility assessment.