Only if the letter is rewritten so that the profession claimed is Biologist and the duties described are those of a biologist. The officer decides on the letter and the degree, not on what the job is called internally.
The profession claimed must match the duties described
TN classification requires Canadian or Mexican citizenship, a profession listed in USMCA Appendix 2, the credential that entry specifies and a prearranged professional engagement with a U.S. employer. In the hypothetical, the applicant is a citizen and holds a biology degree, so two of the three legs are secure. The weak leg is the engagement description. An officer reading an offer for a project coordinator will ask what a coordinator does, and if the answer is scheduling crews and reporting to clients the work is not that of a biologist. If the answer is designing surveys, analyzing data and writing habitat assessments, then the title is a label on professional work and the letter should say so explicitly. The fix is a corrected letter that names the profession, describes the professional duties, states the term and salary, and confirms she will be an employee rather than self-employed.
At a first review, compare the signed letter with a day-by-day duty list before deciding where to apply. The decisive record is the employer’s final letter, signed by someone able to bind the firm; a résumé cannot repair it. Hypothetical example: an urban planner is offered a role called client lead. If the letter substitutes land-use analysis and zoning reports for sales duties, the professional engagement is clearer. A sole-proprietor arrangement fails because TN does not permit self-employment.