Confirmed moderators at the International Congress

Overview of confirmed moderators

Sonja van Renssen

Editor-in-chief, Energy Monitor

Sonja van Renssen is the editor-in-chief of a new digital publication, Energy Monitor (, launched by the New Statesman Media Group in September 2020. Our goal is to tell data-driven stories about the global energy transition. Based in Brussels, Sonja is an experienced journalist and conference moderator who has previously written for leading energy and climate titles including S&P Global Platts, Nature Climate Change, Foresight Climate & Energy and ENDS Europe. Sonja has an MSc in Science Communication from Imperial College London and a BA in Biological Sciences from the University of Oxford. She won a BBC-sponsored Young Broadcaster of the Year Award in 2005. Sonja grew up in part in Taiwan and Japan, and speaks fluent English and Dutch, with a good command of German and French 


Stefan Walter

German Bioethanol Industry Association (BDBe), Managing Director

After twelve years of association work in the areas of real estate and tax policy, Stefan Walter was most recently in-house counsel and head of the tax department at the German Farmers' Association from November 2014 to February 2018.

Thorsten Weidemann

German Bioethanol Industry Association (BDBe)

Consultant for Policy Issues and Sustainability

Prof. Dr. Thomas Willner

Hamburg University of Applied Sciences (HAW Hamburg)      

  • since 1993: Hamburg University of Applied Sciences
  • 1988-1993: ThyssenKrupp, Project management of research and development in oils and fats technology
  • 1983-1988:Hamburg University of Technology, Research in thermochemical liquefaction of lignocellulosic biomass


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