Does an EB-1 Professor or Researcherneed to have a U.S. employer?

A: Yes. A key difference between this category and those with "extraordinary ability" is that professors and researchers must have a job offer prior to applying. This job offer must be from a university or institution of higher learning, and must be in a permanent, tenured or tenure-track position if it involves teaching, or for an indefinite period if it is a non-tenure track research position.