Ioannis Pappas is a Mechanical Engineer, with PhD in Applied Mechanics, with over 28 years of work in several fields of science, focusing in Sustainability for Tourism, Energy and Environmental Efficiency in Infrastructure and Buildings, Advising in standardization of companies and technological implementation of climate adaptation and mitigation methodologies. He is Lead GSTC Assessor for Destinations in EMEA, Auditor for several Sustainable Tourism Certification Standards, focusing in Hotels, Tour Operators and Destinations, and Lead Trainer for GSTC in South East Europe Region.