Read the general professional work overview
Hypothetical example: Shannon is a Canadian dietitian at a North Thompson health centre and the United States employer offering her a clinical position wants to file Form I-129 rather than have her present herself at a port of entry. Both routes exist for a Canadian citizen. They differ in who assembles the file, what it contains, how long it takes and what happens if something is wrong, and the choice should be made deliberately rather than by whichever the employer happens to prefer. Hypothetical example: A Canadian soil scientist has a signed United States offer but the company’s letter calls the work “field support.” The first review should decide whether to revise the source document before choosing a filing route. The profession entry, degree record, and detailed duty schedule settle that issue. A petition does not cure a vague position description, and a quick admission attempt does not cure a missing qualification record.
The petition route moves the burden onto the employer
When the employer files, the company becomes the petitioner and signs the form, which means it takes responsibility for the description of the position and for supporting evidence. The file is assembled in advance and reviewed by an officer without the applicant present, so there is no opportunity to answer a question on the spot, but equally no risk of a decision made in minutes at a counter. Filing fees are the employer's and follow the published schedule. For an employer that has done this before, the process is routine, and its willingness to file is itself a sign that the position and the paperwork have been thought about. Before the employer files, ask it to identify the signatory, the actual worksite, the supervisor, and any third-party client. The signed letter and contract should tell one consistent story. If the company cannot supply those facts, that is a drafting problem to solve before filing, not an omission to explain later.
The port route is faster but unforgiving
Presenting at a port of entry or preclearance location puts the decision in one interaction. Shannon would carry proof of Canadian citizenship, the employer's letter setting out the profession, duties, salary, temporary period and her citizenship, her degree and transcript or professional registration as the profession entry requires, and any credential evaluation. If a document is missing there is no supplementing afterwards. The advantage is speed, since admission in the classification is granted at that moment and work may begin. The disadvantage is that a weak file produces a refusal that is recorded, which is the reason not to treat this route as a trial run. A clean packet has an exhibit list that pairs each required point with its proof. That list lets Shannon decide whether a missing item can be obtained before travel or whether the employer petition is more sensible. It also stops a last-minute substitution of a résumé for the employer’s own statement.
Choose on the facts of this position, not on habit
The petition route suits situations where certainty matters more than speed: a family relocating on a fixed date, a position where the duty description needs careful framing, or an applicant who is currently in the United States in another status and needs a change rather than an admission. The port route suits a clean case with straightforward credentials and a flexible start. Either way the substance is the same: Canadian citizenship, a listed profession, that entry's own qualification, prearranged employment with a United States employer, and no self-employment. Canadians receive no visa stamp, so the admission record should be checked and corrected immediately if wrong. The concrete decision is who bears the uncertainty: an employer filing in advance accepts preparation and adjudication time, while an applicant seeking admission accepts a same-day document review. Neither route permits self-employment. Choose after comparing the record to the profession entry, not after booking travel.
What else is on your mind?
Is a matching job title enough for TN?Can years of experience replace a degree for TN?Can my own U.S. company employ me under TN?Can my spouse work if I hold TN status?Editorial source review: 2026-09-07. General preparation guidance, not an individual assessment.