Ask for the actual documents submitted concerning your case so you can check the account for accuracy. The extent of access can depend on the records and the applicable relationship; confidential employer material may need separate handling. If something is withheld, ask counsel how to obtain or verify the relevant information without assuming an unrestricted right to every document.
The applicant is the one who answers questions
Officers ask the professional about their duties, credentials, employer, and intended period. Answers that conflict with the documents on file create problems even when the difference is innocent. Reading the actual file, rather than a summary of it, is the only way to confirm the account matches. If something in the file is wrong, raise it before any interview or entry attempt rather than at the counter.
What matters is that the U.S. employer has arranged specific professional work matching a listed profession, and that the documentation reflects that accurately. TN eligibility requires Canadian or Mexican citizenship, prearranged professional-level business activity for a U.S. or foreign employer, and the listed profession’s particular education, licence, or experience rule; Canadian permanent residence is not citizenship. If the actual engagement is professional surveying, the letter should say so plainly; if it is site supervision, the listing does not reach it.