Kariuki is the Director of Programmes at The African Academy of Sciences (The AAS) where he leads the Alliance for Accelerating Excellence in Science in Africa (AESA) platform, which was launched in 2015 by The AAS and the AUDA-NEPAD Agency. AESA is The AAS’ funding, agenda-setting and programme management platform. An internationally recognised immunologist, Kariuki leads the Academy's programmatic activities to accelerate world-class research, foster innovation, and promote scientific leadership on the continent. He oversees the funding of research and development and commercialisation of novel, high-impact STI solutions for the continent. He is cultivating strategic partnerships with academic institutions, governments and industry globally to transform Africa’s future through science-led, knowledge-based economies. Prior to his appointment at The AAS, Kariuki served as Director of the Institute of Primate Research/National Museums of Kenya, a biomedical and conservation biology facility. He has published widely on vaccines and diagnostics development for infectious diseases including schistosomiasis (Bilharzia), malaria and co-infections, and on policy related to biomedical research and funding. He is a recipient of several international grants and awards and serves as a member of various Advisory Boards that are supporting the development of excellence in science for global health and developmental challenges.