Scientific positions

• Distinguished Professor Energy System Analysis at Groningen University (April 2014 -…)
• Director of Science & Technology and Principal Scientist, TNO Energy & Materials Transition (in combination with a part time professorship Univ. of Groningen) (November 2018 - …)
• Guest Editor of the Journal Biomass & Bio-energy (Elsevier) (2006…)
• Member of the editorial Board of the Scientific Journal Biofuels (Future Science) (2009 -…)
• Regular reviewing of publications for journals as Science, Energy, Energy & Environmental Science, Progress in Energy & Combustion Science, Energy for Sustainable Development, Energy Policy, Resources, Conservation & Recycling, Fuels, Industrial & Engineering Chemistry Research, Mitigation and Adaptation Strategies for Climate Change, International Journal of Greenhouse Gas Control, Fuel, Global Environmental Change, Renewable & Sustainable Energy Reviews, Applied Energy, Advances in Applied Energy, a.o.
• Frequent reviewing activities for the National Science Foundation (NWO) in the field of energy system analysis and advisor for the theme ‘Sustainable Earth’, NWO program Energy Transitions, NWO/KNAW. Netherlands Organization for Scientific Research (NWO) - Applied and Engineering Sciences (TTW), Member Programme Committee “Energy & Resources”

International networks, memberships and advisory roles

• Young Global Leader (YGL) in the World Economic Forum; by a Selection Committee, composed of the world’s top media leaders and chaired by Her Majesty Queen Rania Al Abdullah of the Hashemite Kingdom of Jordan (2009-…).
• Reviewer and advisor to the Danish Research Council, Science Foundation Ireland (SFI), Belgian Federal Public Planning Service on Science Policy (BELSPO), FWO (Flanders, Science Organisation), Nordic Energy, the Portuguese Foundation for Science and Technology (FCT), Swedish Energy Agency, Academy of Finland, Swiss Federal Office of Energy, Russian Science Foundation, Lithuanian Science Council, National Center of Science and Technology Evaluation (NCSTE) in Kazakhstan, Research council for Lithuania, Swiss Federal Office of Energy, Qatar National Research Fund, United Arab Emirates University, a.o.
• Advisor and reviewer for the International Energy Agency, a.o. World Energy Outlook, Paris, France. (2006 -...).
• Member of the European Research Council (ERC) (2014 -..)
• Expert advisor member of a panel of UNIDO on transformation to sustainable industries (2018 -… in progress). 
• Member of the advisory Board of the RCGI – Research Centre for Gas Innovation (FAPESP, Shell, Univ. of Sao Paulo Brazil) (2019-…)
• Executive Committee Member of EERA (European Energy Research Alliance; 2024…)

National networks and advisory roles

• Chair/member of the Advisory Council of the GreenGold Label on certification of biomass for energy (2010 -...)
• Member of the Sustainability Board of SkyNRG – KLM on sustainable aviation fuels (2011-…)
• Member of ‘Het Groene Brein’ network targeting radical transitions towards sustainability, supported by the National Science Foundation (2012 -…).
• Member of the expert committee for the European Fund for Regional Development (EFRO) – Samenwerkingsverband Noord Nederland (SNN) (2015...)
• Member Scientific Board of the Netherlands Energy Research Alliance (NERA) (2017...)
• Chair of the Scientific Board of the Netherlands Energy Research Alliance (NERA) (2021 - …)