The Marie Curie Alumni Association (MCAA) is an international non-profit association with a global network of researchers, who have benefited or are benefitting from the Marie Sklodowska Curie Actions (MSCA).  Currently, MCAA represents a community of over 19,000 members from 150 countries. MCAA has 34 geographical chapters and 9 thematic working groups.
Overall, MCAA supports, and contributes to, the advancement of knowledge for a universal, diverse, and informed society. MCAA enhances the flow of knowledge across different countries, sectors of the economy, and scientific disciplines. By encouraging networking, cooperation, and mutual understanding among MCAA members, and external stakeholders, MCAA serves as a forum of debate between researchers and society. Finally, MCAA promotes scientific diversity and advocates for policy improvement for the public good.

MCAA and Science Diplomacy: MCAA recently introduced a task force on Science Diplomacy. From 2019, MCAA is organizing sessions at international conferences (World Science Forum, MCAA Annual Conference) topics focusing on science diplomacy for researchers. As an organization spreading over different regions, MCAA aims to provide tools for researchers so that they can practice science diplomacy locally to enhance scientific collaboration, reduce tensions among conflicting regions and advance science.