In 2015 he was assigned the position of Production Planning and Energy Excellence Engineer of the company's refinery and in 2019 he joined the Supply and Trading team as a commodity trader specializing in Aviation and Military Fuels. In 2022 he joined Seanergy Maritime Holdings as the company's Energy& Sustainability Officer. Vasileios has extensive experience in handling technical and operational matters pertaining to the optimization of the day-to-day operations of energy systems as well as the development of new ways to reduce energy consumption and increase efficiency. Furthermore, he has specialized in the evaluation and utilization optimization of alternative fuels including biofuels, Natural Gas and Hydrogen.