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Kevin M. Mattessich concentrates his practice in commercial litigation and he defends companies and their directors and officers in a variety of contexts ranging from the defense of companies in management disputes, engineers sued in mine development suits, stock brokerages and investment advisers and other contexts. In addition, he maintains an active insurance coverage analysis and litigation practice in which he has represented clients all over the globe. Mr. Mattessich is internationally recognized for his experience with investigating and litigating fidelity and fraud related claims, including matters involving Ponzi schemes, securities act violations, cyber risks, commodities and foreign exchange losses, insider trading, D&O liability, qui tam actions and other corporate exposures. He has also been retained to analyze and arbitrate major claims submitted under R&W and other transactional risk policies.

Previously, Mr. Mattessich served as a Trial Attorney in the Criminal Division of the Department of Justice where he prosecuted white-collar fraud cases. He has testified before the Judiciary Committee of the U.S. Senate on health care fraud issues, and he has spoken at numerous seminars on litigation and insurance related issues.

Mr. Mattessich is actively involved in the community affairs of his hometown of Ridgewood, New Jersey.


  • New York
  • New Jersey
  • U.S. Court of Appeals
    • Second Circuit
    • Third Circuit
    • Fifth Circuit
    • Ninth Circuit
  • U.S. District Court
    • Eastern District of New York
    • Southern District of New York


  • Catholic University of America Law School – J.D.
  • Boston College – B.A.
    • cum laude

Professional Memberships

  • American Bar Association
  • ABA Tort Trial and Insurance Practice Section (TIPS)
  • Professional Liability Underwriting Society (PLUS)

Reported Decisions

  • Pepper Hamilton v. Executive Risk (Court of Appeals, New York) – Insurance contract rescission standards.
  • Times Picayune v. Zurich (Fifth Circuit Court of Appeals) – Argued appeal of interpretation of excess coverage terms.
  • Moneygram v. Consortia (Third Circuit Court of Appeals) – Argued appeal over applicability of mandatory arbitration clause to fraud action and jurisdictional issues in wire transfer matter.
  • Cove v. Air Tiger (Suffolk County, New York) – Successfully defended a corporation in an executive employment dispute.
  • Kurtz v. Liberty (Ninth Circuit Court of Appeals) – Rescission of fidleity policy.
  • Musclepharm v. Libert (District of Colorado)- Coverage under D&O policy for SEC investigation costs.


  • New York Metro Super Lawyers (2013)
Mansfield Rule Certified 2023 Super Lawyers Super Lawyers Best Law Firms 2023 Best Law Firms 2024 Martindale Hubbel AV Preeminent Law 360