The TWAS Regional Office for sub-Saharan Africa (TWAS-ROSSA) is hosted by the Academy of Science of South Africa (ASSAf) and aims to enhance the visibility of TWAS, identify eminent scientists for membership and awards, assess TWAS activities in the region, and organize activities in critical science and technology areas. TWAS-ROSSA provides networking opportunities, prizes, and fellowships for young scientists and has over 108 Fellows and 50 Young Affiliates across sub-Saharan Africa. Science academies are independent organizations that bring together eminent scientists to advance scientific knowledge and provide evidence-based science advice to address national and global challenges.