SUPER easy: https://www.uscis.gov/working-united-states/temporary-workers/tn-nafta-professionals https://www.uscis.gov/working-united-states/temporary-worker...

SUPER easy: https://www.uscis.gov/working-united-states/temporary-workers/tn-nafta-professionals https://www.uscis.gov/working-united-states/temporary-worker... You do not need a lawyer and the letter of employment can be done by the HR department of your employer, just be sure to include everything they ask for. I did it all by myself and got my company to reimburse me the fee after I came in to work.