Singas received her bachelor’s degree in political science from Barnard College at Columbia University and her J.D. from Fordham Law School. Singas was an assistant district attorney in the Queens County District Attorney's Office from 1991 to 2006. From 2006 to 2011, she was chief of the Nassau County District Attorney’s Special Victims Bureau. She then worked as the chief assistant district attorney of Nassau County. Singas was elected district attorney of Nassau County in 2015, where she served until her court of appeals appointment in 2021.
