What professional function was served by both Robert Hayden and Andrew Vachss, although for different organizations?
Andrew Vachss: Andrew Henry Vachss (born October 19, 1942) is an American crime fiction author, child protection consultant, and attorney exclusively representing children and youths. Robert Hayden: Robert Hayden (4 August 1913 – 25 February 1980) was an American poet, essayist, and educator. Robert Hayden:  He served as Consultant in Poetry to the Library of Congress from 1976–78, a role today known as US Poet Laureate.
consultant