He has served as Director of the Institute on American Jewish – Israeli Relations at the American Jewish University (Los Angeles) aand has also been a Schusterman Postdoctoral Fellow at the University of Arizona and an analyst in the Israeli Prime Minister’s Office. Dr. Ribak is the author of the book, Gentile New York: The Images of Non-Jews among Jewish Immigrants (2012). He has published numerous articles in various journals such as American Jewish History, Israel Studies Forum, Journal of American Ethnic History, and Polin: A Journal of Polish-Jewish Studies, as well as chapters in books such as Germany and the Americas (2005), War and Peace in Jewish Tradition (2012), and Wealth and Poverty in Jewish Tradition (2015).