Núñez came to the United States on September 10, 1965. She and another Cuban exile librarian, Rosa M. Abella, were hired by the University of Miami's Otto G. Richter Library. There, she and other librarians helped build a significant collection of material involving Cuba and the Cuban exile community. In addition to traditional scholarly works, this included other publications and ephemera and significant donations such as notebooks, photographs, and the papers of the Cuban anthropologist Lydia Cabrera.
