Based in NRGI's Accra office, Sebastian oversees operations in Ghana, Nigeria and Uganda. In addition to his managerial role in Anglophone Africa, Sebastian collaborates with colleagues to enhance program management and quality across Africa.

Sebastian brings over twenty-five years of experience as a dedicated development professional and advocate for social justice, with deep insights into West and East African socio-political landscapes. Before joining NRGI, he held key roles in organizations such as the Integrated Social Development Centre (ISODEC) and SEND Ghana, leading initiatives in grassroots economic literacy and governance. Sebastian has served as the regional representative for the Catholic Agency for Overseas Development (CAFOD) in West Africa and as country director for Oxfam in Ghana. His tenure with Oxfam also saw him hold positions as the regional head of programs in West Africa, based in Senegal, and as the program development manager in Liberia. Most recently, Sebastian served as the country director and change and transformation lead for Oxfam East Africa, spearheading the transition of the country program into an independent Oxfam member in Kenya.

Sebastian holds a bachelor’s degree in sociology from the University of Ghana and a master’s in development studies from Larenstein University of Professional Education in the Netherlands.