Bismark has worked as a Nuclear Engineer and Unit Head: Gas-Cooled Reactors at the International Atomic Energy Agency (Austria, Vienna). During his tenure at the IAEA Dr Tyobeka was also involved in the IAEA team that advises Member States in the development of new nuclear power programmes. He was involved with countries in Africa, South East Asia, Europe and Latin America. He has also been a visiting Scholar at the Nuclear Research and Consultancy Group (Netherlands) and the International Research Associate (Idaho National Laboratory, USA).
He holds three Master's degrees and a PhD in Nuclear Engineering both from the Pennsylvania State University, USA and from North West University in South Africa.