DEFILLA Steivan, Swiss national, President Assistant of the APEC Sustainable Energy Center APSEC since 2018, is in charge of the APEC Cooperative Network of Sustainable Cities created by APEC Leaders in 2014. His “APEC Sustainable Urban Development Report - From Models to Results” has been published in 2019 as first APEC publication of APSEC, followed in 2021 by the “APEC Integrated Urban Planning Report – Combining Disaster Resilience with Sustainability” and in 2023 by the APEC Green Finance Report - Unlocking the Urban Energy Transition, the second ever report of APEC on green finance. He co-authored and edited the APEC Urban Energy Report 2023 – Driving Cities through the Low Carbon Transition (forthcoming). He is also Professor at the School of Architecture, Tianjin University, China, teaching a graduate course on Sustainable Urban Development in APEC under the SDGs. He is the former (2010 – 2016) Director of the Energy Charter Secretariat, an intergovernmental energy organization with 50 Member states headquartered in Brussels, where he supervised or co-authored 26 studies and analyses and a book on energy-related issues. He managed the expansion of the Energy Charter to include 30 new observer states, among them China, who all signed the International Energy Charter declaration in May 2015 in an ad hoc Ministerial conference in The Hague, The Netherlands. As Energy Advisor and Senior Energy Advisor to the Swiss Economics Minister (1999 – 2010) he contributed to the reform of the Swiss electricity sector including to the setting up the green certificates scheme, the Swiss infrastructure strategy and the Swiss foreign energy policy. He wrote a book prefaced by the Swiss Energy Minister and co-authored 13 articles in English, German, French and Russian languages. He also attended Governing Board meetings of the IEA and co-chaired multilateral negotiations at the Energy Charter. He holds a Master degree in Statistics and a Bachelor degree in Economics from the University of Neuchâtel, Switzerland. He also holds a Postgraduate certificate in Energy from the Federal Polytechnic Institute Lausanne, a Postgraduate certificate on quantitative methods in public management from the University of Lausanne and a Terrapinn 3-day masterclass certificate on power project finance. He is winner of a United World Colleges scholarship and is fluent in eight languages.