What You Are Actually Buying
When a manufacturer decides to hire an engineer from Mexico through a TN visa, most of the vetting energy goes into the plant's own checklist: role requirements, salary range, start date. Less energy usually goes into vetting the recruiting firm itself, even though that firm is the one drafting the job description a consular officer will read, confirming the candidate's degree actually maps to a TN engineering category, and managing a process that runs several months from first interview to start date.
A firm that treats this like a standard domestic search, filled from a job board with the paperwork added on afterward, is missing what makes a cross-border engineering hire different. The five questions below are the ones that separate a firm that understands the process from one that is learning on your case.
The Five Questions to Ask
How do you verify a candidate's degree against the TN engineering category before you ever see their profile?
Since the June 2025 USCIS tightening, a computer science or software degree no longer automatically qualifies for the engineer TN category, and job duties have to map precisely to a recognized engineering discipline. A firm that sends you a strong-looking profile without first confirming the degree and the role actually fit the TN category is setting up a denial that surfaces months in, after you have already planned around a start date.
Who reviews the job description and offer letter before they go to the consulate, and is that person an immigration attorney?
Titles like Project Manager or Operations Manager do not correspond to any TN professional category, regardless of what the underlying work looks like. Technician needs a different kind of scrutiny: TN rules include a separate Scientific Technician/Technologist category, distinct from Engineer, with its own degree and experience requirements. The risk is a mismatch between the title on the offer letter and the category the case is actually filed under, not the word itself. A firm that has an immigration attorney review every job description and offer letter, not only the complicated cases, catches these mismatches before they become a denial. Ask whether that review happens on every case or only when something looks unusual.
What is the realistic timeline, and what happens if a case needs more documentation?
The TN process runs through a U.S. consulate, typically around four months on its own, and a full placement from first interview to start date usually runs four to six months. No firm can promise a faster consular calendar or guarantee approval. What matters is whether they tell you that upfront and have a plan for delays, rather than going quiet if a case needs additional documents or a follow-up appointment.
How do they talk about the candidates and the cost of the hire?
Listen for language that frames the hire as a way to cut labor costs, or that oversells a candidate's background to move a placement along faster. A firm that is straightforward about what a candidate has actually done, including the difference between auditor or inspector-level experience and design-engineer experience, is one that gives you an accurate picture instead of a sales pitch.
What does their involvement look like after the offer is signed?
The visa process is only part of the work. Ask what support exists during the engineer's first weeks on the job, who your point of contact is if something comes up, and how the firm defines a successful placement. A firm that considers the job done at the signed offer letter is leaving your team to manage the harder part alone.
A firm willing to tell you what could go wrong, including realistic denial reasons and timeline risk, is more useful to you than one that promises a smooth process every time. TN visa approval is never guaranteed, and no legitimate firm will tell you otherwise.
Red Flags Worth Walking Away From
Vague or borrowed job titles
Titles like Project Manager applied to a role that is actually engineering, or any offer letter title used without confirming which TN category it maps to, Engineer or the separate Scientific Technician/Technologist category, before a consular officer ever sees it.
No attorney in the process
No mention of attorney review, or a description of the visa paperwork as a formality rather than a step that determines whether the hire actually happens.
Cost-savings pitch
Marketing candidates by how affordable the hire will be rather than by qualifications, experience, and fit for the role.
"Approved at the border" language
The TN process runs through a consulate, not a port of entry, and no recruiting firm can promise approval either way. Anyone who tells you otherwise does not understand the process.
No answer on the first 90 days
No clear plan for what support looks like once the engineer is actually on the plant floor.
Before You Sign
Ask who reviews every job description and offer letter, and confirm it is an immigration attorney.
Confirm how candidate degrees are verified against the specific TN engineering category.
Get a clear, written breakdown of the fee structure before any candidate is presented.
Ask what the plan is if a case is delayed or a candidate has to reapply.
Ask how the firm supports the engineer, and your team, during the first 90 days on the job.
This article is informational only. ACE & Bridgewell is not an immigration law firm and does not provide legal advice. TN visa requirements can change and individual circumstances vary. Always work with a qualified immigration attorney for guidance specific to your situation.
