The Marie Curie Alumni Association (MCAA) is a global network of researchers who have benefited from or are benefitting from the Marie Sklodowska Curie Actions (MSCA). MCAA supports and contributes to the advancement of knowledge for a global, 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. The key focus of MCAA is to promote career development offer networking, and science policy. Since its establishment in 2014, MCAA has contributed to shaping the future science policy in Europe, providing different career development opportunities and supporting the wider research community on topics affecting research and researchers' lives. Currently, MCAA has over 21,000 members from 150+ countries. MCAA has 35 geographical chapters and 10 thematic working groups.