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Senior Leadership

Mark J. Lesko
First Assistant United States Attorney

Mark returned to the Office in October 2018, assuming the position of Special Counsel to the United States Attorney, and was appointed to the position of First Assistant United States Attorney in March 2019.  Mark previously served as the Vice President for Economic Development, the Executive Dean of the Center for Entrepreneurship and an Adjunct Professor of Law at Hofstra University. Prior to Hofstra, Mark served as the Executive Director of Accelerate Long Island, a regional collaboration between Brookhaven National Laboratory, Cold Spring Harbor Laboratory, Hofstra University, Northwell Health and Stony Brook University that oversees a seed-stage investment program for biotech companies in New York City and on Long Island. Before Accelerate Long Island, Mark was the three-time elected Supervisor of the Town of Brookhaven, New York State’s second-largest town with a population of 486,000 residents.

Mark previously served in the Office from 2002 to 2009. He served as the Deputy Chief of the Long Island Criminal Division and as a Computer Hacking and Intellectual Property Coordinator. While in the Office, Mark conducted complex and wide-ranging criminal investigations and handled numerous jury trials and appeals. His most notable cases include the prosecutions of the former CEO and CFO of Symbol Technologies, a titanium manufacturing company and its CEO for violations of the Resource Conservation Recovery Act for illegal storage of hazardous waste, two fraudulent financiers of a major motion picture, and a Colombo associate. His trial convictions include a Muttontown, New York couple who tortured two Indonesian domestic servants held in a condition of forced labor and servitude, gang members convicted of the racketeering murder of a man they mistakenly believed to be a member of the MS-13, and the leader of a robbery crew based in the Louis H. Pink Houses in East New York who was responsible for more than 50 armed robberies throughout New York City and Long Island.

Prior to joining the Office, Mark served as an Assistant United States Attorney for the District of Columbia from 1999 to 2002, where he was in the Homicide/Major Crimes Section and handled numerous jury trials and appellate arguments. Mark also worked as an associate at the law firms of Miller & Chevalier in Washington, D.C. and Kirkpatrick & Lockhart in Pittsburgh, Pennsylvania (now K&L Gates). He graduated from Yale University in 1989 and the Georgetown University Law Center in 1994.

Jacquelyn M. Kasulis
Chief, Criminal Division

Jacquelyn M. Kasulis is the Chief of the Criminal Division of the United States Attorney’s Office for the Eastern District of New York.  In that role, Jackie supervises the investigations and prosecutions by the U.S. Attorney’s Office across a wide range of practice areas, which include terrorism, cybercrime, corporate and securities fraud, public corruption, international narcotics trafficking, civil rights violations, and violent and organized crime. 

Jackie graduated from Columbia Law School in 2003, and received her B.A. from Davidson College.  After graduation, Jackie worked as a litigation associate for four years at Kirkland & Ellis LLP in New York.  Jackie joined the Office in January 2008 and has served in the General Crimes, Organized Crime and Business and Securities Fraud Sections.  From September 2014 to November 2015, Jackie served as Deputy Chief in General Crimes and Tax Co-Coordinator for the Office, as Deputy Chief in the Business and Securities Fraud Section from November 2015 to March 2017, and was appointed Chief of the Business and Securities Fraud Section in March 2017 and served in that role until her appointment as Acting Chief of the Criminal Division in March 2019 and then Chief of the Criminal Division in June 2019.

Jackie led the Office’s investigation and prosecution of three individuals, including two former Goldman Sachs bankers and a wealthy Malaysian financier for their participation in a multi-billion dollar money laundering and bribery conspiracy related to 1Malaysia Development Berhad (l MDB), Malaysia's investment development fund. 

Jackie was the lead AUSA in United States v. Martin Shkreli, a high-profile six­ week trial of a pharmaceutical executive, in the summer of 2017.  Shkreli was charged in four interrelated fraud schemes that resulted in over $20 million in losses to investors.

Susan L. Riley
Chief, Civil Division

Susan L. Riley is the Chief of the Civil Division of the United States Attorney’s Office in the Eastern District of New York. As chief, she oversees all of the wide-ranging affirmative and defensive practices, cases and matters within the Civil Division, including affirmative civil enforcement, asset forfeiture, civil appeals, civil rights, environmental, employment discrimination, immigration, constitutional tort (Bivens), medical malpractice, health care fraud, mortgage fraud and other financial fraud litigation.

Susan joined the Civil Division in 1994 and specialized in asset forfeiture and employment discrimination litigation. Prior to her appointment as Civil Division chief in 2003, she served as Chief of the Long Island Civil Division from 2000 to 2003 and as Chief of Employment Litigation from 1997 to 2000. She was awarded the Henry L. Stimson Medal in 1999 as well as a Director’s Award for Superior Performance as an Assistant U.S. Attorney.

Susan is a magna cum laude graduate of Wesleyan University and a graduate of Georgetown University Law School. She served as law clerk to the late June L. Green, of the United States District Court for the District of Columbia, and as a Trial Attorney in the Federal Programs Branch of the Civil Division of the Justice Department. Immediately prior to joining the Office, she was Senior Associate General Counsel for Litigation at Howard University in Washington, D.C.

Updated July 29, 2019

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