After the 2002 elections Bangura founded the National Accountability Group (NAG) whose mission was to fight against official corruption and to promote transparency and accountability in government. In 2006 she left Sierra Leone for neighbouring Liberia where she was appointed Director of the Civil Affairs Office in the United Nations Mission in Liberia (UNMIL) and given responsibility for the reconstruction of 16 Liberian ministries and 30 government agencies following that country's devastating civil war.