Daniel Zaleznik


I help clients with matters that cross borders, be it complex litigation, investigations or compliance.

Daniel Zaleznik focuses his practice on complex litigation and international arbitration with a focus on cross-border disputes, international arbitration, and compliance with trade sanctions and export controls. 


  • Harvard Law School, J.D., cum laude, 2021
  • University of Massachusetts Boston, M.S., 2014
  • Vanderbilt University, B.A., with high honors, summa cum laude, 2008

Bar and Court Admissions

  • Massachusetts


  • Defended individual associated with international cryptocurrency exchange against alleged violations of the Bank Secrecy Act.
  • Represents a foreign state and its instrumentality in a commercial dispute in U.S. Federal Court.
  • Represents a foreign state and state owned enterprise in an investment arbitration at ICSID.
  • Provides advice on potential exposure to Russian sanctions to businesses, including a European aerospace firm and an American cybersecurity firm.
  • Counsels an industrial manufacturer and importer with respect to pending petition to lift Customs and Border Patrol Withhold Release Order.
  • Advised major institution of higher education with respect to an inquiry from the International Trade Commission.
  • Represents a Permanent Mission to the United Nations in a civil dispute.


  • Served as advisor to the Permanent Mission of the Kingdom of Tonga to the United Nations and the Permanent Mission of the Republic of Nauru to the United Nations supporting activities of the Chair of the Group of Pacific Small Island Developing States (2014-2018)


  • Co-author: "Global Leadership on Climate-Linked Human Insecurity: Learning from Pacific Island States," Georgetown Journal of International Affairs (November 7, 2020)