Dr Stefanakis is Assistant Professor at the School of Environmental Engineering, Technical University of Crete in Greece. He is also Visiting Professor at the German University of Technology in Oman, and Regional Coordinator for Africa and Middle East for the ‘Wetlands for Water Pollution Control’ Specialist Group of the International Water Association. He is Editor-in-Chief of the journal ‘Circular Economy and Sustainability’, and Associate Editor of the journal ‘Environmental Science and Pollution Research’. He is an environmental engineer and researcher focusing on water engineering and specifically on nature-based solutions and ecological engineering. He is an expert on sustainable and decentralized water and wastewater treatment systems. He has designed, managed, and constructed several wastewater treatment facilities across Europe, Middle East, Africa, USA and South America. In the past, he worked as researcher and lecturer at the the University of Brighton in the UK, the University of Beira Interior in Portugal, the Helmholtz Center for Environmental Research – UFZ in Germany, and the Democritus University of Thrace in Greece. His publication record includes articles in international scientific journals and conference proceedings, as well as two books and several book chapters. He is also the co-editor of an upcoming two-volume work on Circular Economy that covers its multiple aspects from business and policy till engineering and society by 202 contributors from academia, industry, business and the policy-making environment and practice. He is known in the related international field as an enthusiast of green technologies for water management and reuse, always trying to promote and disseminate such technologies and transfer his knowledge to young engineers and students.