Mark C. Zauderer

Mr. Zauderer frequently serves as an arbitrator and private mediator of significant disputes and is a member of the national roster of commercial arbitrators of the American Arbitration Association and its International Centre for Dispute Resolution. He is a past President of the Federal Bar Council and is a member of the Board of Editors of the New York Law Journal.

Case List

  • Trials of complex partnership disputes.
  • Representation of major national and international companies in complex business disputes at trial and on appeal.
  • Defense co-counsel in a suit brought by Eliot Spitzer, who was at the time the attorney general of New York state, against the former chief of the New York Stock Exchange, Richard Grasso, to recover Grasso’s allegedly improper $187.5 million pay package. All claims against Grasso were eventually dismissed.
  • Obtaining a dismissal of a $500 million malpractice suit against the international law firm of Chadbourne & Parke.
  • Representation of a group of 57 former partners from the failed law firm of Dewey & LeBoeuf LLP in a highly publicized bankruptcy proceeding seeking to claw back pay and other benefits from the former partners.
  • An appointment as referee with all the powers of the New York Supreme Court, to adjudicate all disputes between the partners of the national law firm Napoli Bern, and to oversee the dissolution of the firm and transition of its 24,000 clients.
  • Representation of former Clinton administration cabinet member Ronald Brown, at the time the United States Secretary of Commerce, in a lawsuit brought against him and the major television networks by former presidential candidate Eugene McCarthy. McCarthy alleged that Brown, former chair of the Democratic National Committee, had improperly excluded him and others from the televised 1992 presidential debates. The claims against Brown were dismissed.
  • Defense of antitrust and securities class actions.
  • The successful appeal of a seminal case defining the extent of the extraterritorial application of the U.S. Securities Laws. Itoba Ltd. v. Lep Group PLC, 54 F.3d 118 (2d Cir. 1995), denied, 516 U.S. 1044 (1996).
  • SEC investigations, including representation of a major university in connection with an insider trading investigation.
  • Acting as lead trial counsel in significant real estate disputes involving such issues as restrictive covenants, claims arising out of diversion of water, claims of competing purchasers, real estate brokerage disputes, and easements.
  • Representation of major companies and individuals in Federal and State government investigations.
  • Representation of major law firms in complex litigations and trials involving breach of fiduciary claims by former partners, and in significant malpractice matters.
  • Court appointment as special referee.
  • Service as arbitrator and as a private and court-appointed mediator in major business disputes.
  • Current service as a director of the New York International Arbitration Center and as member of the National Roster of AAA Commercial Arbitrators.


  • New York University School of Law (J.D., 1971)
  • Union College (B.A., 1967), with distinction/departmental honors