top of page

Arnon Siegel

Arnon Siegel served as a law clerk to Justice Clarence Thomas at the Supreme Court of the United States, and has since amassed twenty years of experience as a litigator.  His practice extends to federal and state trial and appellate courts and administrative agencies on a wide range of matters, and his experience encompasses briefing or arguing before nearly every federal court of appeals.


He has litigated cases concerning international sovereign debt claims against the Republic of Congo and an international trade dispute against an Italian defendant.  He has also advised and litigated on behalf of leading investment houses, banks, and funds on the Securities Acts of 1933 and 1934, the Investment Company Act of 1940, and other securities and commercial matters in courts all over the country and before the U.S. Securities and Exchange Commission.  In addition, he has litigated complex class actions and bankruptcy cases, at both the trial and appellate levels.


Arnon has experience litigating a wide range of cross-border disputes.  In addition to litigating international commercial cases, Arnon represented the winning party in the seminal case involving international “libel tourism,” Matusevitch v. Telnikoff, where Arnon successfully had a U.K. libel judgment struck down on U.S. constitutional grounds, briefing and arguing the case in front of the federal trial and appellate courts in Washington and the highest court in Maryland.  In addition to numerous Fortune 500 companies, Arnon’s clients have included a U.S. federal judge, whom Arnon defended in proceedings involving novel constitutional issues, including freedom of speech.


Arnon also served for fourteen years as an officer in the Judge Advocate General’s Corps of the United States Army (Reserves).  He was on active duty in Operation Joint Guard in the Balkans, where he served as a trial lawyer prosecuting criminal and administrative cases and as a member of the NATO Claims Tribunal for the former Yugoslavia.  Arnon continues to be active in military affairs and serves on the Board of Advisors of the National Institute of Military Justice.  In December 2008, Arnon represented the NIMJ as an official non-governmental observer at the military commissions in Guantanamo Bay.


Upon graduating from Yale Law School, he served as a law clerk at all three levels of the federal court system: to Justice Clarence Thomas at the U.S. Supreme Court and the United States Court of Appeals for the District of Columbia Circuit and to Judge Robert P. Patterson, Jr. of the United States District Court for the Southern District of New York.


Arnon speaks French, German, and Hebrew.

Arnon Siegel.jpg


  • Yale Law School (J.D.)

  • Brown University (B.A.)

Bar Admissions:

  • New York and District of Columbia Bars

  • Several U.S. District Courts and
    U.S. Courts of Appeals

  • U.S. Supreme Court

bottom of page