Prof. Dr. Nicolaos Theodossiou studied Civil Engineering at the Aristotle University of Thessaloniki, where he acquired his PhD. He is currently a professor at the Division of Hydraulics and Environmental Engineering and director of the Water Resources Engineering and Management Laboratory of the Department of Civil Engineering of the Aristotle University of Thessaloniki and Vice President of the Department of Civil Engineering, AUTh. He is working on water resources management and the protection and restoration of the environment. His skills and expertise include water quality, environment, water resources management, hydrological modeling, water chemistry, environmental impact assessment, wastewater treatment, water and wastewater treatment, water treatment, and environmental pollution.