George Marnellos is currently a Professor at the Department of Mechanical Engineering, University of Western Macedonia and Chairman of the Cluster of Bioenergy and Environment in West Macedonia. He obtained his Bachelor and Ph.D. in Chemical Engineering from the Aristotle University of Thessaloniki, and a Master degree in Business Administration (MBA) from Macedonia University. On 2010, he was awarded by the Fulbright foundation a research scholarship to cooperate with MIT in the field of fuel cells. On November 2015, he was awarded by UoWM a prize for Innovative Research in 2012-2014. His research activities are focusing on the design and development of nano-materials, components and systems for various energy and environmental applications toward a decarbonized economy. During his academic career great scientific achievements were accomplished in the fields of hydrocarbons processing, hydrogen and fuel cell technologies, CO2 utilization, air pollution control and biomass to energy conversion applications.