Sienna Merope-Synge
Adjunct Professor, Global Justice Clinic

Sienna Merope-Synge co-supervises the Global Justice Clinic’s project on Climate Justice in the Caribbean, and certain components* of the Clinic’s project on Torture, Rendition, and Detention.  Alongside her position at NYU Law, she is advocacy and campaigns manager at Crisis Action, where she builds global coalitions to prevent and protect civilians from war and mass atrocity, with a focus on the war in Yemen and national security abuses in Mali. She was previously legal advocacy director at the Institute for Justice & Democracy in Haiti (IJDH), where she led the organization’s work seeking accountability for emblematic rights violations in Haiti, including efforts to secure remedies for victims of the UN-introduced Haiti cholera epidemic and child support for victims of sexual exploitation by UN peacekeepers. Sienna worked between New York and Port-au-Prince between 2015 and 2020 and speaks fluent French and Haitian Creole. Prior to IJDH, Sienna worked as a UN consultant on issues of transitional justice and gender-based violence, in private practice in Australia and clerked for the Chief Justice of New South Wales, Australia.

Sienna received her LLM from NYU School of Law in 2015, where she was a Hauser global scholar and student advocate in the Global Justice Clinic. She holds political science and law degrees with first class honors from the University of Melbourne, Australia.

*Sienna supports cases before the Inter-American Commission on Human Rights and the African Commission on Human and Peoples’ Rights. She is not involved in any proceedings, advocacy, or client representation before the International Criminal Court.




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