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Sean Mirski focuses his practice on appellate and international matters. He has assisted clients on issues such as the law of armed conflict, foreign sovereign immunity, the act of state doctrine, the law of the sea, the Helms-Burton Act, and other subjects of public international and foreign relations law. Mr. Mirski has also worked on appeals and dispositive motions relating to areas like products liability, the False Claims Act, attorney's fees, and the Fourth Amendment.

Prior to joining the firm, Mr. Mirski served as a law clerk to the Honorable Samuel A. Alito, Jr., of the United States Supreme Court and to the Honorable Brett M. Kavanaugh of the United States Court of Appeals for the DC Circuit. He also served as Special Counsel to the General Counsel of the US Department of Defense.

Mr. Mirski is a graduate of Harvard Law School, where he served as Supreme Court Chair for the Harvard Law Review and as an oralist on the winning team in the annual Ames Moot Court Competition. After his first year, he was one of two students awarded the Sears Prize for having earned the highest grades in the first-year class. He was also awarded the Addison Brown Writing Prize for writing the best essay on maritime law.

Mr. Mirski was named to the 2019 Forbes 30 Under 30 Law & Policy list.



  • J.D., Harvard Law School, 2015, magna cum laude
  • M.A., International Relations, University of Chicago, 2011, honors
  • B.A., Political Science and Economics, University of Chicago, 2011, honors


  • District of Columbia
  • New York
  • U.S. Court of Appeals for the Fourth Circuit
  • U.S. Court of Appeals for the District of Columbia Circuit

Government & Military Service

  • Special Counsel (International Affairs), US Department of Defense, Office of the General Counsel, 2016–2017


  • U.S. Court of Appeals for the D.C. Circuit, The Honorable Brett M. Kavanaugh
  • Supreme Court of the United States, The Honorable Samuel A. Alito, Jr.


  • Award for Outstanding Achievement, Office of the Secretary of Defense, US Department of Defense