him the opportunity to collaborate with local researchers on the RDP. This collaboration inspired him to create Retecza (resource-driven technology concept center). During its inception in South Africa in 2008, the organisation welcomed cross-disciplinary researcher and industrialist participants from around the world. One of the outcomes of Retecza was the design and construction of a hydrogen motorbike named "Ahifambeni". Entrepreneurship After leaving Georgia Tech, he moved to Midrand, Johannesburg, where he created an experimental laboratory for environmental-friendly chemicals. Since its founding in 2012, the laboratory has generated several inventions. He also taught mechanical engineering briefly at the University of Johannesburg.Sasol Chemcity recognised the Midrand lab activities and provided funding through its program for small and medium-sized enterprises. Working in collaboration with concrete manufacturers and mining companies, he developed "green" chemical binders Solunexz and Glunexz for coal dust, construction aggregates, and charcoal. With continued support from Sasol, he developed Amoriguard, a non-volatile organic compound paint and skim coating based on tailings and industrial waste. Amoriguard has received Agrément certificate. In 2014, he worked on flushing solar-powered toilets that operate as a miniature waste-treatment plant. This technology based on nanofiltration and anaerobic digestion is implemented in places where water supply and sanitation are scarce. In 2016, while developing acid bricks, Doyoyo designed and manufactured Ecocast brick making machines that save water and energy, while adaptable to off-grid communities. References University of Cape Town alumni Brown University alumni Massachusetts Institute of Technology alumni Academic staff of the University of Johannesburg South African engineers South African inventors MIT School of Engineering faculty Georgia Tech faculty Living people People from Limpopo South African Venda people 1970 births People from Thulamela Local Municipality 21st-century inventors