Sophie Nonnenmacher joined IOM in 2000. After working at Headquarters to develop IOM's portfolio on labour migration and development, Sophie was appointed in 2009 to the Regional Office in Bangkok as thematic specialist on migrant assistance and protection where she was responsible for providing technical advice at the policy and programmatic level among others on migrants in vulnerable situations, trafficking and smuggling in the Asia-Pacific region.

Successively Ms. Nonnenmacher was appointed first as the regional migration policy officer, and later on as the administrator of the newly established entity “Regional support office of the Bali Process on People Smuggling, Trafficking in Persons, and related Transnational Crime”.

Ms. Nonnenmacher served as IOM Thailand's acting Chief of Mission until 2017, where she joining the IOM Regional Office for West and Central Africa as the Senior Regional Policy Officer and Deputy Regional Director.

Ms. Sophie Nonnenmacher holds a Diploma of Specialized Studies (DESS) in Political Sciences from the University of Paris- Sorbonne, a Master’s degree in Social Sciences and a Diploma of Advanced Studies (DEA) in Social and Political Anthropology from the École des Hautes Études en Sciences Sociales in Paris, as well as a Master’s degree in Philosophy from the University of Paris Nanterre.