Ronald Greenwald (January 8, 1934 – January 20, 2016) was an American Orthodox Jewish rabbi, who was a businessman and an educator.
Born in New York City, he made a career of spy trading, international hostage mediation, and other forms of high-stakes, high-intrigue diplomacy.
He served as presidential liaison of President Richard Nixon to the Jewish community during the Nixon administration.
He served as a community activist, chaired various civic boards, directed a high school and a summer camp, and was the chairman of Magenu.