Mark S. Olinsky has been a civil and criminal trial lawyer for more than thirty years. He served as a federal prosecutor in the Office of U.S. Attorney Samuel A. Alito, Jr. and is Past President of the Association of the Federal Bar of New Jersey. Mr. Olinsky’s diverse caseload includes complex business disputes, health care litigation, complex commercial landlord-tenant litigation, and white-collar criminal defense. His courtroom experience includes many jury and bench trials, arbitrations and appeals, and his expertise includes defense of federal and state RICO actions.

He has conducted numerous corporate internal investigations and has represented both individuals and corporations in a wide variety of government investigations, particularly in the health care and pharmaceutical industries. He has successfully represented large health care systems and high-level executives in recent investigations involving alleged violations of the False Claims Act, the Anti-Kickback Statute, and other federal health care statutes and regulations.


  • Litigation
  • Appellate
  • Corporate Investigations and Integrity
  • Health Care
  • Intellectual Property
  • Intellectual Property Litigation
  • White Collar Criminal Defense

Expand All

Court Admissions

  • U.S. District Court, District of New Jersey
  • U.S. District Court, Southern District of New York
  • U.S. District Court, Eastern District of New York
  • U.S. District Court, Western District of New York
  • U.S. Court of Appeals, Second Circuit
  • U.S. Court of Appeals, Third Circuit
  • U.S. Supreme Court




Client Alerts

Rankings and Recognition

  • Selected for inclusion in:
  • Chambers USA: America’s Leading Lawyers for Business®* 2010-2021, New Jersey Litigation: White-Collar Crime & Government Investigations
  • Benchmark Litigation: America’s Leading Litigation Firms and Attorneys®* "Local Litigation Star" 2016-2024
  • The Best Lawyers in America®* 2007-2024, Commercial Litigation; Litigation - Regulatory Enforcement (SEC, Telecom, Energy); Criminal Defense: White-Collar
  • The Best Lawyers in America®* Newark "Lawyer of Year" 2015, 2022 and 2024, Litigation – Regulatory Enforcement (SEC, Telecom, Energy)
  • New Jersey Super Lawyers®* 2006-2024, Business Litigation; Criminal Defense: White Collar; Health Care
  • New Jersey Super Lawyers®* "Top 100 Super Lawyers" 2017-2018
  • New York Metro Super Lawyers®* 2006, 2020-2023, Business Litigation; Criminal Defense: White Collar; Health Care
  • Martindale-Hubbell®* AV rating
  • Received Professional Lawyer of the Year Award, as selected by the Association of the Federal Bar of New Jersey and the New Jersey Commission on Professionalism in the Law, in 2019.

* See Award Methodology. No aspect of this advertisement has been approved by the Supreme Court of New Jersey.


  • Professional Affiliations
  • Past President, The Association of the Federal Bar of New Jersey

  • Trustee, The Historical Society of the United States District Court for the District of New Jersey

  • Trustee, Harvard Law School Association of New Jersey

  • Trustee, Yale Club of Central New Jersey

  • Trustee and Vice President, U.S. Attorney’s Alumni Association of New Jersey

  • Fellow, American Bar Foundation

  • Member, Association of Criminal Defense Lawyers of New Jersey

  • Member, Section on Litigation, American Bar Association

  • Member, Section of Criminal Justice, American Bar Association

  • Member, New Jersey State Bar Association

  • Member, American Health Lawyers Association

    — Member, Fraud and Abuse Practice Group, Enforcement Committee

  • Community Affiliations
  • Member, Essex Chain Gang Cycling Club


  • J.D., Harvard Law School, cum laude
  • B.A., Yale University, summa cum laude, Phi Beta Kappa

Bar Admissions

  • New Jersey
  • New York