you can ask them to sponsor H1B visa for you to work in the US. You do not need to go through the below steps of finding companies and applying for job, you can go to step 2.
The CBP Officer will review your application and then conduct an informal interview by asking you questions to determine if you are being truthful about coming to the U.S. for work, and whether you and the job qualify for the TN Visa under NAFTA....
That's one of the "Trusted Traveler" programs CBP runs that allows certain low-risk passengers who make an appointment for an interview and submit to a background check to travel through customs and passport control more quickly when they arrive in the U.S. A Custom Border Protection officer...