Sophie Lemaître is a lawyer by training with extensive experience in governance, anti-corruption issues, natural resources sector, and illicit financial flows. She worked for various organisations and NGOs at the national and international level, including CIRAD, the Food and Agriculture Organisation of the United Nations, and Sherpa. Between 2019 and 2023, she was a Senior Adviser at U4 Anti-Corruption Resource Centre.

She hold a PhD degree in law from the University of Rennes 1 in France, on corruption, tax evasion/avoidance, and money laundering within the extractive industries, Master degree in international business law from the University of Toulouse, France, as well as a LL.M. on international and European environmental law from University College London.