Peter R. Ginsberg Law, LLC is a boutique law firm specializing in complex civil litigation and criminal defense.

Peter R. Ginsberg is the managing partner of Peter R. Ginsberg Law, LLC. Both as a federal prosecutor and private attorney, he has focused his practice in the areas of complex criminal investigations and trial work as well as related civil litigation. He also litigates and advises extensively in the field of sports law and has considerable experience handling affirmative civil rights matters.

Peter has represented clients in a wide range of white collar criminal and securities matters as well as sophisticated commercial matters. Peter handles all phases of criminal litigation from pre-indictment through trial, post-conviction and appellate representation. He has represented corporate and individual clients in the areas of money laundering, fraud, bribery, RICO, tax evasion, antitrust, environmental and health care fraud, as well as matters involving federal espionage, Foreign Corrupt Practice Act matters and international hedge fund and investment management matters. In addition, Peter has represented both government officials and private citizens in public corruption trials and investigations, and in congressional and other governmental and regulatory investigations. In the civil arena, Peter has represented clients involved in securities, commercial, transactional, defamation and intellectual property disputes as well as members of the Board of Directors of off-shore hedge funds and health care officials. In the sports arena, Peter has focused mainly in the area of professional football, representing chiefly players and coaches in both League matters and litigation.

Peter spent approximately seven years as an Assistant United States Attorney in the Eastern District of New York. During that time, Peter was awarded the United States Attorney General’s John Marshall Award for “Outstanding Legal Achievement.”

A 1976 graduate of the University of Pennsylvania, Peter received a Thouron Fellowship and matriculated at the London School of Economics and Political Science, where he received a Master of Science Degree in economics and international relations. Peter then attended the Columbia University School of Law, where he received a Juris Doctor Degree in 1980. 

University of Pennsylvania, 1976 
London School of Economics and Political Science, M.S., 1977 
Columbia Law School, J.D., 1980 

Admitted to practice: New York, U.S. District Courts for the Southern and Eastern Districts of New York, District of Columbia, Eighth Circuit Court of Appeals, Supreme Court of the United States


Beth A. Manzullo is an associate at Peter R. Ginsberg Law, LLC.  She graduated summa cum laude from the University of Illinois College of Law in 2009.  

She was a member of the Order of the Coif and the University of Illinois Law Review, where she served as a Notes Editor.  She authored an article entitled "No Longer Blind to Status-Blind Harassment," which won Third Prize in the College of Labor and Employment Lawyers' Writing Competition, and was electronically published on their website, in 2008.  From 2009 to 2013, Beth worked as a judicial law clerk for the U.S. District Court for the Middle District of Pennsylvania, in Harrisburg.


Grove City College, B.A., 2006

University of Illinois College of Law, J.D., 2009


Admitted to practice: New York, Virginia, U.S. District Courts for the Southern and Eastern Districts of New York


Matthew B. Keller’s practice focuses on litigation, criminal defense, regulatory compliance and appeals. Matthew served as a law clerk to United States District Judge I. Leo Glasser in the Eastern District of New York and as a Staff Attorney at the Office of the United States Court of Appeals for the Second Circuit. Matthew began his litigation career as an Associate at Kramer Levin Naftalis & Frankel LLP.  


Matthew graduated magna cum laude from Brooklyn Law School in 2005, where he served as Executive Notes and Comments Editor of the Journal of Law and Policy and Co-Author of the Moot Court Problem for Brooklyn Law's nationally-recognized Prince Evidence Moot Court Competition.  Matthew currently teaches at Brooklyn Law School as an Adjunct Professor of Legal Writing.  Prior to law school, Matthew attended the United States Air Force Academy and earned a degree in Electrical Engineering and Computer Science from the Massachusetts Institute of Technology.


Matthew is a member of the federal Criminal Justice Act Panel for the United States District Court for the Eastern District of New York.


United States Air Force Academy

Massachussets Institute of Technology, B.S., 1997

Brooklyn Law School, J.D., 2005


Admitted to practice: New York, U.S. District Courts for the Southern and Eastern Districts of New York, Second Circuit Court of Appeals