Mark Harris is a partner in the Litigation Department, co-chair of the Appellate Practice Group, and a member of the Securities Litigation and White Collar Defense & Investigations Groups.  He represents institutional and individual clients in both civil and criminal litigations.

Mark is a former clerk to U.S. Supreme Court Justices John Paul Stevens and Lewis Powell, Jr., and Judge Joel Flaum of the U.S. Court of Appeals for the Seventh Circuit. Mark subsequently served as an Assistant U.S. Attorney for the Southern District of New York, during which he prosecuted a broad spectrum of federal crimes, including health-care fraud, financial fraud, and corporate embezzlement, and tried a number of jury trials and argued before the Second Circuit.

Mark has handled dozens of cases in the U.S. Supreme Court and other appellate courts in a variety of areas spanning criminal law, patent, copyright, labor relations, and administrative law, including:

• Representing Biosig Instruments before the U.S. Supreme Court and the Federal Circuit, in a case that redefined the standard for patent definiteness and upheld the validity of Biosig’s patent.  He was named The American Lawyer’s Litigator of the Week for that result.

• Obtaining reversal of the trial conviction of a former Gen Re executive in the Second Circuit.

• Persuading the Second Circuit via a petition for interlocutory review and merits brief to vacate a class-certification order entered against Sprint Corporation.

• Successfully representing electronic publishers before the U.S. Supreme Court in Reed Elsevier Inc. v. Muchnick, which Managing Intellectual Property Magazine named the 2010 "U.S. Copyright Case of the Year."

• Successfully representing an employer before the U.S. Supreme Court in 14 Penn Plaza LLC v. Pyett, which overturned 35 years of precedents concerning the enforceability of arbitration clauses in labor agreements.