With a maximum of 65,000 issued yearly, the most common temporary non-immigrant visa is the H1B visa for people with specified professional or academic fields. This visa is for those with higher education and typically a job offer from a United States employer requiring specialized knowledge.
In addition to academic and professional requirements, proof must be submitted indicating a lack of sufficient applicants in the United States. Every visa application must demonstrate that the employer attempted to recruit Americans for the position unsuccessfully.