Prof. Konstantinos Aravossis is Secretary General for Forestry at the Greek Ministry of Environment and Energy. Prior to that he was Secretary General of Natural Environment & Water. He is a Mechanical Engineer (Technical University of Aachen -Germany) with an M.Sc. in Management Science from Imperial College – University of London. He has further been awarded a PhD by the National Technical University of Athens, focusing on Operations Research. He is Professor and UNESCO Chair for Green Innovation and Circular Economy at the NTUA (National Technical University of Athens) and Professor at the ATHENS MBA (NTUA – Athens University of Economics) since 1997  . He is the Coordinator of the “Environmental Economics and Sustainable Development Research Group” of the Sector of Industrial Management and Operations Research of the Mechanical Engineering School. He was the Environmental Advisor to the President of the greek New Democracy political party and current Prime Minister. He was President of the greek Branch of the Waste to Energy Research and Technology Council (www.wtert.gr) coordinated by Columbia University and associate researcher of the Earth Engineering Center -Columbia University as well as visiting Professor at Imperial College-London. He was President of the Coordinating Committee of the Institute of Production and Operations Management / Hellenic Management Association. He has been an advisor of the deputy Minister of Culture for the Olympic Games Constructions and their Post-Olympic utilization, President of the Greek Association of Environmental Protection Companies, President of the Hellenic Solid Waste Management Association (HSWMA) (now Hon. President) ,President of the Ordinary Environmental Committee of the Technical Chamber of Greece and member of Evaluation Committees for Investment and Energy Projects of the Ministry of Development. Furthermore, he has been member of the Board of the Organisation of Labour Residencies (OEK).and General Manager of Environmental Companies. He has organised 11 Int. Conferences , has over 100 international Publications of books and research papers and has coordinated a great number of national and international resear