Diem Huong Ho

International Associate
Washington, DC
Diem Ho works within Foley Hoag’s International Litigation & Arbitration Department. She focuses her practice on advising and representing sovereign States on matters of public international law and international investment law. 

Prior to joining the firm, Diem worked for four years at the Permanent Court of Arbitration (PCA), focusing on theoretical aspects of more than 17 cases administered by the PCA, including interstate and investment disputes relating to land and maritime boundaries, law of the sea, natural resources, infrastructure, construction and confiscation of real estate and assets. She was a research assistant to Dr. Michael Waibel at the Lauterpacht Centre for International Law on matters of public international law and international investment law. She previously worked with a leading international law firm and interned at the Ministry of Foreign Affairs of Vietnam.

Diem obtained her LLB from King’s College London and her LLM in International Law, with distinction, from University College London.


  • King's College London, LL.B., 2013
  • University College London, LL.M., International Law, Distinction, 2014

Bar and Court Admissions

  • England and Wales
  • New York


  • Vietnamese
  • French
  • Chinese (Mandarin)


  • Representing the Republic of Mauritius before ITLOS in Dispute Concerning Delimitation of the Maritime Boundary between Mauritius and Maldives in the Indian Ocean.
  • Representing The Gambia before the ICJ in Application of the Convention on the Prevention and Punishment of the Crime of Genocide (The Gambia v. Myanmar). 
  • Representing the State of Qatar in arbitration proceedings initiated against Bahrain, Egypt, Saudi Arabia, and the UAE under the auspices of the Universal Postal Union.
  • Representing Mauritius in an ad hoc arbitration pursuant to UNCITRAL rules brought by two Indian companies relating to the termination of a land development agreement and administered by the PCA.

Honors & Involvement

  • Netherlands Institute for the Law of The Sea Moot Court Competition: Judge (2019)
  • The Honourable Society of the Middle Temple: Member (UK)