The primary USA Work Visa is the H1B visa.
The US Governments H1B Visa Program is designed to provide highly skilled Workers and Graduates, from all over the World, the opportunity to live and work in the USA.
The Fact is: You can Not work in America without a visa.
You Must Find a Job with a company who will sponsor (file) an H1B visa for you.
The Process to Successfully Get Your H1B Visa to Work in USA....
Step 1) you must find a job with a company who will 'sponsor' an H1B visa for you
Step 2) your new employer (sponsor company) then files your H1B application
Step 3) your visa application is approved by the US Immigration Bureau
Step 4) you can start work for your new employer (H1B sponsor company) in the USA.