Mary Singer is an American philanthropist and development professional best known as the former wife of billionaire hedge fund manager Paul Singer. Born in the mid-20th century, she married Paul Singer in the early 1970s, and the couple raised two sons, Andrew and Gordon, during their 20-year marriage, which ended in divorce in 1996. The divorce settlement was reportedly substantial, reflecting Paul Singer's growing wealth through Elliott Management, though details remain private. Professionally, she serves as Director of Principal Gifts at the University of Chicago Booth School of Business, a role that leverages her expertise in major donor cultivation and executive education. Post-divorce, Mary Singer has maintained a low public profile while engaging in professional work in higher education fundraising, residing in New York and continuing her discreet involvement in educational advancement.