Petrus has extensive experience as a political analyst focusing in particular on African political economy, the extractive industries, and political risk. In his career he lectured in Political Science and International Relations in South Africa, the USA, and presented guest lectures, and seminars and at various international conferences.
In addition to lecturing Petrus also has experience as a consultant and advisor on social, political and economic dynamics in the African market to private and public entities. He has published extensively on international affairs, and African political, economic, and security issues. He has conducted several in depth field research projects in African countries including Sudan, Southern Sudan, Democratic Republic of the Congo, Kenya, Uganda, Nigeria, and Mozambique. His research focuses on internal social, economic and developmental dynamics, as well as regional and international political economic factors.
Petrus holds a PhD in Philosophy from the University of the North, an MA (Cum Laude) in Political Science from University of Pretoria (UP), Hons degree in International Politics (UP), and BA in Political Science (UP).