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Mark R. Seiden


(T) +1.212.326.3451
(F) +1.212.755.7306


  • Yeshiva University, Benjamin N. Cardozo School of Law (J.D. cum laude 1992; Editor, Cardozo Law Review); Bucknell University (B.A. 1988)

Bar Admissions

  • New York; U.S. District Courts for the Southern, Eastern, and Western Districts of New York; and U.S. Court of Appeals for the Second Circuit

Mark Seiden has successfully represented clients in product liability, commercial litigation, and complex civil litigation in courts throughout the United States. Since 2010, he has served as trial counsel in more than a dozen jury trials.

Mark's representation of R.J. Reynolds Tobacco Company spans more than a decade and includes a wide variety of cases including putative class actions, third-party payor lawsuits, individual product liability cases, marketing and unfair practices claims, and alleged international money laundering.

On behalf of Macy's, Mark led a Jones Day team that successfully opposed — both at the trial and appellate courts — a request for certification of a nationwide class of vendors pressing claims under UCC Article 2. On behalf of IBM, he successfully argued before the New York Court of Appeals that alleged soil and groundwater contamination did not constitute a material breach of a commercial lease. He also represented IBM on a number of insurance coverage matters.

In addition, Mark has significant experience representing asset-based lenders, including factors and A/R financiers.

Mark is deeply committed to working on pro bono matters and serves as the New York Office's pro bono coordinator. He has developed deep experience in international child abduction matters, representing parents in Europe, South America, Mexico, and the Caribbean. Mark has served as practice coordinator for the office's New Lawyers Group for more than half a decade.

Mark is an adjunct professor of law, teaching a pretrial practice seminar at Cardozo Law School.

Honors & Distinctions

  • Selected as a New York State "Super Lawyer" by Super Lawyers magazine (2013, 2014, 2015, and 2016)

    Career Development columnist for the New York Law Journal (2007, 2008, and 2009: 17 published columns)
Mark Seiden