There are different means to acquire a U.S. visa, however the most common is by an employer sponsor based in the U.S. or a family member who is a citizen of the U.S. Most work visas necessitate that you have a firm job offer from a U.S. company before making the application. If you are a highly skilled worker, it might be easier for you to find a job in the U.S. than if you are an unskilled professional. If you are persecuted in your country, it might be possible to acquire refugee or temporary protected status.