She is an Emerita Professor of the University of Ghana, and until her retirement in May 2017, she served as the Director of the Social Development Policy Division, of the United Nations Economic Commission for Africa (ECA), located in Addis Ababa, Ethiopia.
[1] Manuh went on to complete her primary education at the Kwame Nkrumah University of Science and Technology (KNUST) Primary school also in Kumasi, after which she entered Wesley Girls' High School, Cape Coast, for her secondary education.
[1][5] She later went on to pursue a doctorate degree in Anthropology at the Indiana University Bloomington, graduating in the year 2000.
[1][5] Following her postgraduate studies in Tanzania, Manuh gained employment as a Research Fellow at the University of Ghana in 1979.
[4] She is a member of the Scientific Committee of the Association of African Universities (AAU), the Council for the Development of Social Science Research in Africa (CODESRIA), UNESCO's International Institute for Educational Planning (IIEP) Governing Board, the African Gender Institute Board, the Steering Committee of the South-South Exchange Program on the History of Development (SEPHIS), the Steering Committee of NETRIGHT, the ABANTU for Development board of which she chairs, and the Coalition for Women's Rights in Ghana.