Grigoris Papagiannis received his Diploma in Mechanical & Electrical Engineering and his PhD from the Aristotle University of Thessaloniki in 1979 and 1997 respectively. He is currently Professor of Power System Analysis in the School of Electrical & Computer Engineering of the same University. He worked more than 38 years as researcher and instructor in under- and post-graduate courses, vocational training and life-long learning programs. He coordinated or was key researcher in 48 regional and European projects. He is Senior member of IEEE, member of the Technical Chamber of Greece, ΙΕΤ and CIGRE. He was consultant in the Greek Ministries of Development, Energy and Environment, Finance, in the Greek DSO and TSO and in private companies. He has been Head of the School of Electrical & Computer Engineering of the AUTH (2017-2020), Deputy Head of the same School, Head of the Department of Electrical Energy and Director of the Power Systems Laboratory