IN THIS GUIDE · Review the professional arrangement after an employer acquisition
Start with the TN eligibility and application overview
Compare the actual job before and after
Hypothetical example: a professional offer predates a sale, and the buyer proposes a different mix of duties. Identify real deliverables and the profession claimed. The temporary activity must fit the listing; a retained engineering title does not automatically make newly assigned commercial work qualifying engineering activity.
Preserve the individual qualification analysis
TN requires eligible Canadian or Mexican citizenship and the specific profession’s qualifications. Review permitted alternatives precisely. For engineers, the listing provides a baccalaureate or licenciatura degree or state or provincial licence; U.S. practice authority is a separate issue. The buyer’s acceptance of the employee does not replace credential evidence.
Identify the resulting legal arrangement
Explain the actual employer, customer relationships and relevant applicant ownership or control. Services to a U.S. entity solely owned or controlled by the applicant are outside the permitted arrangement; foreign ownership alone is not a blanket disqualification. A buyer or seller label does not settle that analysis.
Reassess permission before relying on continuity
Describe the genuine transaction stage and proposed activity. Have relevant changes assessed rather than assuming a previous file or employer letter covers the resulting arrangement. A closing date or announcement is not itself authorization to perform U.S. work.
Apply the temporary-work and credential boundaries
TN concerns qualifying temporary professional activity for Canadian or Mexican citizens. Providing services to a U.S. entity solely owned or controlled by the applicant falls outside the permitted arrangement; a foreign business interest alone is not a blanket disqualification. Degrees from institutions outside Canada, Mexico and the United States require a reliable foreign-credential evaluation. Any licence needed to practise the profession in the United States is a separate question from the listed TN qualification.
TN requires an employer, and self-employment is not permitted
Engineering titles get applied loosely across companies, and an 'engineer' role can mean anything from hands-on technical design to project coordination with little technical content. TN admission is for the period the employer requests, up to three years at a time, and returning home does not end it, but the applicant should carry the original letter and credentials on every re-entry because an officer may ask again. Keep original transcripts and licence documents, and only commission a credential evaluation or translation once the applicable procedure and profession are confirmed. The governing condition does not bend for goodwill: the position must sit within a listed occupation and the applicant must hold the qualification that occupation specifies, so a role that quietly becomes a generalist post during a restructure may no longer fit. Ask which record proves each required qualification: a final diploma, transcript, licence, or carefully matched experience record where an alternative is permitted. A Canadian citizen may request classification during inspection at an entry location or preclearance, and an employer can use an I-129 petition with USCIS. The work must be prearranged professional employment in a profession that appears on the USMCA list, and the applicant must satisfy that profession’s own qualification requirement. A Canadian applicant may ask CBP for TN admission at a border crossing or preclearance facility; alternatively, the U.S. employer can submit Form I-129 to USCIS.
Sources reviewed 2026-09-07. This guide covers a preparation focus; it is not an individual eligibility assessment.