David Bigge has been an attorney at the U.S. Department of State since 2010, and is currently the Chief of Investment Arbitration. He has previously represented the United States at the UN Sixth Committee. From 2016 to 2019, he served as the U.S. Agent to the Iran-U.S. Claims Tribunal, and has served as Deputy Agent and counsel in two cases at the International Court of Justice. Mr. Bigge was also the primary U.S. point of contact for the International Criminal Court, the Permanent Court of Arbitration, the UN International Residual Mechanism for Criminal Tribunals, and the Hague Conference on Private International Law. Mr. Bigge has advised the U.S. government on commercial arbitration and enforcement issues arising in U.S. courts. Prior to joining the State Department in 2010, Mr. Bigge was an attorney in private practice in New York for nine years, specializing in international arbitration and litigation for and against foreign sovereigns. He has appeared in U.S. federal and state courts and in arbitrations administered by ICSID, the PCA, the ICC and AAA.

Mr. Bigge has served in several leadership positions at the American Society of International Law, including on its Executive Council and as co-chair of the International Courts and Tribunals Interest Group. He publishes and speaks regularly on international dispute resolution. He previously taught courses on Advanced Topics in International Arbitration and Philosophy of International Responsibility at Georgetown University Law Center. Mr. Bigge graduated from Harvard Law School in 2001.