Greg De Temmerman

Director of Deeptech and Spin-Off Excellence at Techleap

Greg is a strategic leader at the frontier of science, energy technologies, and climate action. From fusion energy research to philanthropic capital deployment and deeptech innovation, he has operated across systems and combines a deep technical understanding of the energy system and its evolution as well as a grasp on the political economy behind it.

From 2014 to 2020, Greg served as a scientific coordinator on the ITER project, the largest and most complex scientific project in the world. In 2020, he became the Founding Managing Director of Zenon Research, a Paris-based think tank that analyses emerging trends in climate technologies. From 2023 to October 2025, he was the Deputy CEO and Chief Science Officer at the Quadrature Climate Foundation (QCF), where he led the Science and Evidence, and Programmes teams. He was responsible for identifying new opportunities for deploying philanthropic capital. Since January 2026, he is director of Deeptech and Spin-Off Excellence at Techleap (a government funded organization) in Amsterdam where he oversees the development of a founder-focused national programme to accelerate the emergence of breakthrough innovations. He is a senior fellow at Zinc Innovation Partners and an associate researcher at Mines Paris PSL and Imperial College London.

TED speaker and published author with a history of public engagement at the highest levels, he has published more than 240 scientific articles, authored the book ‘Energy Chronicles’, and contributed to three other books. Greg is regularly featured in major media on topics related to climate tech, energy and climate. In October 2025, with 55 other runners he became holder of the Guinness record for the World’s deepest marathon.