Treat it as a planning target only, since eligibility review and the government's decision are separate steps.
Identify what still needs confirming
Before relying on the dealer’s first-day schedule, resolve discrepancies among the offer, customer service agreement and actual task allocation. Confirm the employer that receives the services, the intended duration and the qualification used for the listed profession. Mark any pending customer contract or change in repair duties rather than treating it as finalized. The appropriate next step depends on the applicant’s citizenship and circumstances; a Canadian admission request and a Mexican visa process are not interchangeable schedules. Ask the employer which commercial dates can move if review or a government decision takes longer than hoped. Retain revised documents for reassessment when the arrangement changes, and begin only the work permitted by the actual authorization obtained.
Work backward from authorization, not the commercial launch. Verify Canadian or Mexican citizenship, select a profession in Appendix 2 to Annex 16-A of the USMCA, confirm its minimum credential, and secure an employer letter or contract covering the prearranged activity. For Canadian citizens, the available mechanisms include requesting TN classification at an eligible port of entry or preclearance location, or having a prospective employer file Form I-129; the choice depends on actual facts, not a promised turnaround. Work can be arranged for either a U.S. or foreign employer, but TN permits no self-employment. Sequence contract execution, credential review, application, decision, travel, and only then the first workday. Mistakenly, employers treat a target date as authorization.
Hypothetical example: A computer-systems analyst near Tecumseh is slated to configure irrigation-control databases for an equipment supplier when a sales rollout begins. The customer statement of work is still being negotiated and may add hardware replacement duties. The supplier makes the date conditional, finalizes a truthful scope, and checks the analyst's credential before choosing a procedure. If the duties change, the case is reassessed instead of forcing the original launch date.