 Witkin then moved from pupil to teacher, teaching at Saint Martin's for two years.He then moved to the United States.At Bennington College, Bennington, Vermont, Witkin worked with a community of artists known as "the Green Mountain boys" who either taught at the school or were part of the local arts community, including notables such as painter Kenneth Noland, Helen Frankenthaler, Larry Poons, Paul Feeley and Jules Olitski and art critic Clement Greenberg.