Sakis is a founding shareholder of Helesi AE. He holds a degree in Chemical Engineering from the National Technical University of Athens. Before founding Helesi, Sakis spent ten years in waste management consulting for Public Authorities and Municipalities, five of which he also served as a researcher of the National Technical University of Athens specialising in waste management and treatment methods. He also spent two years as head of the R&D department of Achaika Plastika, a plastics manufacturer in Greece and in 1990 he founded Perivallontiki AE, a Greek company with activities in waste management services, engineering and sales of special vehicles and equipment for the waste management industry.Sakis will be responsible for the strategic direction of the Group including identifying and developing new products and market opportunities.