Nathalie began designing the Sair da Casca project in 1993, shortly after arriving in Portugal. Sair da Casca was born out of the conviction that companies are the driving force behind sustainable development and that they need to strengthen their links with society in order to maximize their positive impact. The concept of Sair da Casca was the result of the first years of professional experience, dedicated to investigative journalism, many collaborations with NGOs related to extreme poverty and the first participations in the creation of companies related to information and citizenship. In Portugal, her entrepreneurial streak continued with Sair da Casca and later with her participation in the short-lived company Gandaia (which linked art and the reuse of "abandoned" furniture) or in Finance for Social Impact - FSI, created with Sair da Casca.

Nathalie is responsible for business development and internationalization. She follows the themes of inclusive business, social impact assessment and the role of education for economic and social growth. She is a member of the European Union's Expert Group on Sustainability - Networking for better Corporate Social Responsibility (CSR) advice to Small and Medium Sized Enterprises (SMEs). She is a Fellow of the Rothschild Foundation for social entrepreneurship, accompanying various social entrepreneurs through mentoring; a member of the GRACE Board in Portugal and of the Action Tank movement (France). She is also secretary general of the French Economic Council in Portugal.

She studied History and Philosophy at La Sorbonne University and has a degree in Journalism from IPJ, Paris. She has a Certificate in Human Rights from Amnesty International and several Certificates in Social Entrepreneurship (Cambridge and Cornell).