David worked in Enoch Pratt where he authored a bibliography of its Yiddish and Hebrew holdings that was acknowledged as a resource for cataloging at the Amherst Yiddish book Center by Naomi Glick:
2. At Pratt, David fielded all reference questions and selected books in religion, philosophy, languages, and other areas as noted by Head of the Humanities Department Bob Burke:
While working at Pratt and earning a PhD, David published articles including one in Drobitsky Yar Kharkov noted below:
The Melvin J. Berman Hebrew Academy also acknowledged David's library guides at Pratt.
Additionally, he helped several patrons and organizations. David's assistance was noted in many letters, including one from Beth El Congregation:
A parent, Dr. Rabbi David Katz, of a Bnos Yaakov student thanked Dr. Levy for his help in completing projects related to religious discrimination.
David helped University Professors of Music With Their Research
Dr. Korsakova-Kreyn taught music therapy and appreciation, Dr. Schmidt worked for the Opera Company in Baltimore, and Dr. David was professor at the Peabody Music Conservatory
David Also Helped Researchers at the Enoch Pratt Library With Their Research
David assisted the following researchers: Dr. Paul Schatzberg, chemist for the environmental protection agency; Illene Wieselthier, former Head Librarian of the Melvin J. Burman Hebrew Library; Laura Atkin, playwright for the Washington based Theater for Youth; Ulrich Cohn, Jewish Holocaust Emigre from Leipzig, Germany; Attorney Frank B. Cahn; Dr. Emanuel Goldman, former head of the Education Department; Rabbi Mitchell Wohlberg, of Beth Tefilah Congregation; Barbara Cohn and Bail Rao.