Education and career
The Foxman family immigrated to the United States in 1950. Foxman graduated from the Yeshivah of Flatbush in Brooklyn, New York City, earned a Bachelor of Arts degree in political science from the City College of New York and graduated with honors in history. Foxman also held a J.D. degree from the New York University School of Law. He did graduate work in Jewish studies at the Jewish Theological Seminary of America, and in international economics at The New School.
In 1965, Foxman was hired by ADL legal representative Arnold Forster as a legal assistant in the ADL's international affairs division. He rose through the ranks of the organization, becoming the head of its Middle Eastern affairs and later its international affairs. In 1987, Foxman was the consensus choice of the Board to become its new National Director, replacing long-time director Nathan Perlmutter. Also that year, he was appointed to the council of the United States Holocaust Memorial Museum by U.S. President Ronald Reagan, and was reappointed by subsequent U.S. Presidents George H. W. Bush, Bill Clinton, and Joe Biden.
As the then head of the ADL, he is credited by the Jewish Telegraphic Agency for having transformed the organization "from a division of B'nai Brith into a muscular juggernaut" that offered anti-bias and training programs, combatted antisemitism in the U.S. and worldwide, and pushed for anti-discrimination laws across several locations. In 1999, amid a wave of antisemitic violence in Europe, he criticized the leaders of France and Germany for failing to address the issue. Such remarks earned him access to world leaders and figures such as Pope John Paul II, with whom he would meet frequently. He also met with diplomats, celebrities, and CEOs, and heard apologies from figures who made anti-Jewish remarks, stating that it was essential to accept apologies, especially from those who can serve as prominent allies for Jews.
Foxman retired as head of the ADL in 2015, being succeeded by Jonathan Greenblatt. He later served as vice chair on New York's Museum of Jewish Heritage board of trustees between 2016 and 2021.
He was co-author of the 2013 book, "Viral hate: containing its spread on the Internet."