Jonathan is a co-founder and managing partner of Boies Schiller Flexner. One of the most highly regarded commercial litigators and arbitration lawyers in the United States and overseas, he has served as lead counsel in numerous successful high-stakes, high-profile cases for clients including Barclays, Goldman Sachs, the New York Yankees, and the fantasy sports website DraftKings. Chambers USA called him “one of the premier international arbitration attorneys in the world” and Who’s Who Legal: Litigation said he is known for his “comprehensive advice which always takes the bigger picture into account.”

Representative victories include winning dismissal of federal antitrust class action against the restaurant Eleven Madison Park in January 2019, the successful defense of DraftKings against attempts by state attorneys general to shut down its business operations in 2015 and 2016; successful prosecution of an international arbitration claim on behalf of OPAP in the Court of International Arbitration over the Greek state’s appropriation of valuable license rights in the Greek lottery; securing through trial $9 billion in assets for Barclays relating to the bank’s purchase of the Lehman Brothers brokerage business in the 2008 financial crisis; a 2014 arbitration award for Goldman Sachs that rejected claims of fraud by the co-founders of Marvell Technology Group; a 2013 dispute preventing the ticket reseller StubHub from opening a storefront near Yankee Stadium; and a settlement in January 2013 for the clothing magnate Tory Burch in an intellectual property dispute with her former partner and husband. He led the successful defense of Elite World and its subsidiaries, Supreme Model Management and The Society Management, in connection with the international model agency’s acquisition of two teams of managers from a rival agency, Wilhelmina, resulting in the dismissal of Wilhelmina’s lawsuit in New York state court. Jonathan is currently leading the global defense of Barclays in lawsuits and class actions following the bank’s $453 million LIBOR settlement. He is also defending Barclays in the ICE LIBOR antitrust class action filed in January 2019.

Jonathan has tried cases before juries and judges in federal and state courts in the United States, and before arbitral tribunals worldwide including the ICC, the LCIA, and UNCITRAL. He has represented global corporations based in the United States, France, the Netherlands, Germany, Kuwait, and Singapore in complex commercial disputes against foreign sovereigns and companies. In addition to representing world-class clients, he has served as an arbitrator in ICC, UNCITRAL, AAA, and ad hoc arbitrations. He served as a member of a Tribunal of the ICC International Court of Arbitration in 2016 related to the failure of replacement steam generators that Mitsubishi supplied for the San Onofre Nuclear Generating Station in southern California.

While maintaining full litigation and management responsibilities at BSF, Jonathan recently finished his five year term as Chair of the Board of Trustees of Columbia University.

Jonathan received Columbia Law School's highest honor, the Medal of Excellence, in 2019. He received the Alexander Hamilton Medal for “distinguished service and accomplishment” from Columbia College in 2012. In 2006, he received the John Jay Award for “distinguished professional achievement” from Columbia College, and in 2017 was named an inaugural Legend of Ivy League Basketball for "achievements and contributions to the Ivy League.” He was elected a fellow of the American Bar Foundation “in recognition of professional attainment, and distinguished service”, has been a member of the Milan Chamber of Commerce national and international arbitration club of arbitrators for 22 years, and is National Membership Chair of the U.S. Supreme Court Historical Society. Jonathan is a Trustee of the American Ballet Theater, and was Chair of the Board of Directors of the Washington Tennis and Education Foundation (1996-1998), which provides tennis instruction and academic tutoring to at-risk children throughout Washington D.C.

Publications & Presentations

Parallel Proceedings Involving International Arbitration, International Disputes Seminar, ICC, Los Angeles, California (October 1999)

Identifying and Applying the Law Governing the Arbitration Procedure - Role of the Law of the Place of Arbitration, A Commentary, ICCA Congress Series No. 9, Paris (May 1998)

Providing for Confidentiality in International Mediation, ICC Institute of International Business Law and Practice (October 1995)

Destruction of Grand Jury Documents, Destruction of Evidence (1989) (co-author)

Modification of Pension Fund Contributions During the Term of a Collective Agreement: The 1987 Employment and Economic Security Pact, 90 West Virginia Law Review 843 (1988)

The Legal Liability of Private Security Guard Company for the Criminal Act of Third Parties, An Overview, The Annals 91 (July 1988)


  • Columbia Law School, J.D.
  • Columbia University, B.A. , Political Science; Chair, Columbia Board of Trustees (2013–present); Blue Key Honor Society; Ivy League Championship Basketball Team; Columbia University Athletics Hall of Fame



  • District of Columbia
  • New York

Awards and Associations

Chair, Columbia University Board of Trustees (2013–2018)

Medal of Excellence, Columbia Law School (2019)

Inaugural Legend of Ivy League Basketball for “achievements and contributions to the Ivy League” (March 2017)

Alexander Hamilton Medal for distinguished service and accomplishment from Columbia College (2012)

Member of the Dean's Council of Columbia Law School

John Jay Award for Distinguished Professional Achievement (Columbia University 2006)

Board of Trustees, Supreme Court Historical Society, Washington D.C.

Board of Trustees, American Ballet Theater

Life Member, Fellows of the American Bar Foundation (2001)

Best Lawyers in America (2005-2019)

Super Lawyers (2008-2018)

Lawdragon 500 Leading Lawyers in America (2006-2019)

Considered “one of the premier international arbitration attorneys in the world,” and "A seasoned practitioner with an impressive reputation," The US Legal 500

“Recognized as a leading practitioner in the field of international arbitration,” and a "real warrior, who will wade into any battle for you." Chambers USA 

“Litigator of the Week,” The AmLaw Litigation Daily (2011)

One of the most highly regarded individuals, “the real deal,” a Top Ten International Commercial Litigator, Who's Who Legal

Who’s Who Legal International (2010–2019)

Milan Chamber of Commerce International Arbitration Club of Arbitrators (1995-Present)


  • Hon. Charles R. Richey, U.S. District Court: District of Columbia