Background & Experience

Isabelle A. Kirshner is one of New York's premier criminal defense trial attorneys. She has won acquittals for her clients in both state and federal court. Isabelle has more than thirty years of experience defending individuals and entities in a wide range of criminal matters including investigations and prosecutions relating to securities fraud, money laundering, bank fraud, tax fraud, as well as distribution of crystal methamphetamine, opioids, and allegations of sexual misconduct. She has represented individuals at every stage of criminal proceedings, from the inception of a criminal investigation through indictment and trial.

Isabelle has tried cases involving a wide range of criminal charges, including one of the largest criminal tax shelter cases ever brought by the U.S. Department of Justice. Among her successes are an acquittal of murder and racketeering charges in a multi-defendant case in federal court, acquittal of all charges in a conspiracy case in which she successfully asserted an entrapment defense on behalf of her client, and an acquittal of all charges in a federal Hobbs Act and conspiracy case.

She has successfully represented a number of individuals in high profile matters, including the former Attorney General of the State of New York.

Isabelle served as an Assistant District Attorney in the Manhattan District Attorney’s Office from 1982 to 1986. Thereafter, she entered the private sector as a criminal defense attorney, and joined Clayman & Rosenberg LLP in 2005. Isabelle has lectured on federal and state criminal practice for a number of different bar organizations and is a long time faculty member of the Intensive Trial Advocacy Program at the Benjamin N. Cardozo School of Law.

Isabelle sits on the Peer Review Committee for the Criminal Justice Act and the Criminal Justice Advocacy Board for the United States District Court for the Southern District of New York. She serves on the Central Screening Committee for the 18B Panel for New York County. She served as a member of District Attorney Cyrus Vance’s transition committee. She is a Fellow in the American College of Trial Lawyers.


Isabelle is a Fellow of the American College of Trial Lawyers (an organization comprised of the nation’s elite trial lawyers) and served as Chairperson of its Downstate Committee for two years. Since 2008 and every year thereafter, she has been selected as a "Super Lawyer" in the New York City Metro area. She is the 2018 recipient of the Equalizer Award from Gideon's Promise and, in 2019, was awarded the New York State Association of Criminal Defense Lawyers' Thurgood Marshall Practitioner of the Year Award.


Isabelle is a graduate of the State University of New York College at Oswego and the Benjamin N. Cardozo School of Law.


Isabelle is admitted to practice in New York, the United States District Courts for the Southern and Eastern Districts of New York, and the Supreme Court of the United States.