Nathalie Le Rousseau-Martin is a legal expert and co-director of the Observatory of International Criminalities (ObsCI), as well as an Associate Research Fellow at IRIS.

Her work focuses on the analysis of international crime and its geopolitics, criminal actors and crime facilitators (corruption, money laundering, criminal service providers), human trafficking and migrant smuggling, counterfeit trafficking, and international strategies to combat organised crime.

She served as a legal adviser to Amnesty International for over 15 years and was a member of the Council of Europe’s Group of Experts on Action against Trafficking in Human Beings (GRETA) from 2016 to 2023.

Since 2017, she has been a colonel in the operational reserve of the French National Gendarmerie, providing expertise to the Central Office for Combating Crimes against Humanity and Hate Crimes (OCLCH) on issues related to the commission of international crimes and associated forms of criminality.

She taught international economic law, criminal law, the law of international institutions, and criminology at the University of Toulouse I and the Free Faculty of Law in Toulouse from 1998 to 2023. She is also the author of publications and investigative reports on international human rights protection mechanisms, international crime, and efforts to combat human trafficking.