Previously, Weinstein was the Alternative Dispute Resolution Administrator for the U.S. District Court for the Eastern District of New York, where she was a mediator and directed the court's mediation, arbitration and mediation advocacy programs. While at the EDNY, she developed a Pilot Mediator Incubator  to recruit, mentor and train junior attorneys from diverse backgrounds to serve as mediators on the court’s roster. She also implemented a Trial Ready Rapid Mediation Pilot for civil cases in which trials were delayed due to the pandemic. 

Prior to her role at the court, Weinstein was the director for the Los Angeles office of Arts Arbitration & Mediation Services of California Lawyers for the Arts and an adjunct clinical professor of mediation at the Straus Institute for Dispute Resolution at Pepperdine Caruso School of Law.  During her time in California, she was on the board of the Southern California Mediation Association and was board president in 2015. From 2017-2020, she was on the Council of the ABA Dispute Resolution Section. She also was the co-chair of the ABA Dispute Resolution Section Court ADR Committee and chair of the Diversity, Equity and Inclusion (DEI) Subcommittee.  She is the co-chair of the DEI Subcommittee of the New York City Bar Association ADR Committee.

An alumnus of Cardozo Law School, Weinstein was a Fellow of the Kukin Program for Conflict Resolution from 2014-2015.