One of the ways to receive a US Green card is through sponsorship of a qualified employer.
A petitioner (worker),however, may waive the sponsorship by filing a National Interest Waiver (NIW).
Applicant must show proposed employment is valuable to the US national goals.
Science, research, art & business are all examples of qualifying fields for the waiver.
Although it appears complicated, various cases have been decided using similar guidelines.
NIW cases are detailed oriented, so assistance of a lawyer is highly recommended.
Following cases have been approved in the past: an executive in railroad industry, an engineer in liquid crystalline polymer, a coach, a violinist, a hematology researcher, a social scientist, a court psychologist, an atmospheric chemist & a new company's salesman.