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DIS Title Divider Visiting Scientists Title Divider TN Overview
Visiting Scientists
TN Overview

TN (Trade NAFTA – North American Free Trade Agreement) Purpose

To engage in activities related to research in the biomedical sciences by citizens of Canada or Mexico

NIH Designations

NIH Designations that can be supported as TN: All FTE (Full-Time Equivalent) positions and most Non-FTE positions


TNs are eligible for an initial period of up to three (3) years with extensions available up to three (3) years at a time. At present, there is no limit on the number of extensions that can be requested. The TN status begins when the foreign national scientist acquires TN status within the U.S.


TNs can switch employers, provided the new employer timely files a TN petition or the TN applies for admission to the U.S. with the new employer. Employment cannot begin until the new employer receives approval of the TN petition or gains entry under the new employer’s sponsorship.

DIS Info 
Office Hours:
8:30am - 5:00pm
Check-In Hours:
9:00am Mondays
Walk-in Hours:
1:30pm - 3:30pm Mon-Thurs
Badge Clearance:
9:00am - 11:00am
Tuesday & Thursday