This call for expressions of interest is to solicit applications to host regional nodes for the African Open Science Platform (AOSP) in five African Regional and Economic Communities (RECs) – namely at the Southern African Development Community (SADC), the East African Community (EAC), the Economic Community of Central African States (ECCAS), the Economic Community of West African States (ECOWAS) and the Community of Sahel-Saharan States (CENSAD).