Prof. Ahmed Ennaoui studied physics and chemistry and obtained a master and doctoral degree in solid-state electronics from the University of Bourgogne, France. He moved to Germany and conducted research for his habilitation (1983-1987) with Prof. Helmut Tributsch “Abteilung Solare Energetik und Materialforschung” at the Hahn Meitner Institute (HMI), Berlin, Germany. He explored the photovoltaic and electrochemical use of novel earth-abundant and non-toxic materials (e.g. Iron Disulfide, Pyrite) for solar energy conversion, and obtained his habilitation (summa cum laude) for his desrtation titled Iron Disulfide FeS2 Pyrite: Synthesis, Photoelectrochemistry and physical properties for solar energy conversion. He worked as a senior scientist at the HMI, and in 2000, he is appointed head of a research group at Helmholtz-Zentrum Berlin (HZB) “the former HMI”. He received different grant projects financed by the European Commission and the German Federal Ministry of Education and conducted successful feasibility studies financed by the industry (Siemens/Shell-Solar/Avancis, Solibro, Bosch, Atotech). All his projects are targeting photoelectrochemical solar cells, solid-state thin Film solar cells and new concept, from planar films to nanostructures. He served as a member of Qatar Foundation (2015-2017) with a position of joint Professor at Hamad Bin Khalifa University (HBKU) and Research Director of Solar Energy group at Qatar Environmental and Energy Research Institute (QEERI). At QEERI he was conducting research, managing research groups, recruiting top talents. He established a track record, building partnerships with industry and academia during the period from January 2015 to May 2017. He managed in his group QEERI’s solar test facilities (STF with ~200 kW) and contributed to the development of PV soiling solution, improving O&M of the infrastructure at the STF. He proposed also a relevant low CAPEX manufacturing Thin Film PV technology to reduce the cost per watt peak of solar modules through building of a baseline for inkjet printing as a precision deposition technology. He designed a syllabus for the College of Science and Engineering at HBKU and taught several seminars on Solar Photovoltaic Technology for graduate students. Currently, he serves as president of the Scientific Council of IRESEN, the Moroccan Solar Energy Research Institute, deeply engaged at for the establishment of mechanisms to support and reinforce R&D on renewable energy. Ahmed Ennaoui has deep expertise in processing materials and devices for solar energy conversion and thin film chalcogenide solar cells. He is author and co-author of more than 200 peer-reviewed journal articles, numerous conference contributions, he edited five special issues and granted several patents, his published work on pyrite FeS2, 2 Dimensional layered materials, kesterite, cadmium free chalcopyrite solar cells, DSSC solar cells has been recognized with h-index 41. He is a permanent member of the Editorial Board of Solar Energy Materials and Solar Cells, reviewer for several top scientific journals, member of International Solar Energy Society (ISES), and the Institute of Electrical and Electronic Engineers (IEEE). He is serving as chair of the scientific-technical committee for the International Renewable and Sustainable Energy Conference (IRSEC). During his career he supervised more than 40 completed thesis and ca. 15 Postdoctoral have worked in his group.