As the global transition to clean energy accelerates, a new generation of leaders is shaping the future of sustainable power. From policymakers and CEOs to scientists and activists, these individuals are driving critical advancements in renewable energy, policy frameworks, and clean technology. Whether through research, investment, or industry leadership, their work is paving the way for a low-carbon economy.
Here are 10 clean energy leaders to follow in 2025.
1. Dr. Ursula von der Leyen – President, European Commission
Dr. Ursula von der Leyen has been instrumental in shaping the European Green Deal, a policy roadmap aimed at making the EU climate-neutral by 2050. Under her leadership, the EU continues to push forward ambitious clean energy initiatives, including hydrogen development, offshore wind expansion, and carbon pricing reforms.
2. Jigar Shah – Director, U.S. Department of Energy Loan Programs Office
Jigar Shah plays a critical role in scaling clean energy in the U.S. by overseeing billions in financing for projects in battery storage, nuclear, and hydrogen. His leadership in de-risking private investment through federal loans makes him a key figure in energy transition efforts.
3. Markus Krebber – CEO, RWE AG
As the head of one of Europe’s largest energy companies, Markus Krebber is leading a massive transformation toward renewables. RWE is investing heavily in offshore wind, solar, and green hydrogen, positioning itself as a major player in clean energy markets.
4. Martin Green – Professor, University of New South Wales
A leading figure in solar technology, Martin Green’s innovations in photovoltaic efficiency have helped drive down solar costs globally. His research continues to shape the solar energy industry.
5. Fatih Birol – Executive Director, International Energy Agency (IEA)
Fatih Birol leads the IEA’s push for global energy transition, advocating for policies that accelerate renewable energy deployment while ensuring energy security. His insights guide governments and investors in clean energy planning.
6. Tzeporah Berman – Chair, Fossil Fuel Non-Proliferation Treaty Initiative
An influential climate policy advocate, Tzeporah Berman is leading the charge for an international treaty to phase out fossil fuels. Her work connects activists, policymakers, and financial institutions to push for stricter fossil fuel regulations.
7. Philipp Schröder – CEO, 1KOMMA5°
At 1KOMMA5°, Philipp Schröder is building a decentralized energy ecosystem by combining solar, battery storage, and heat pumps. His company is rapidly expanding in Europe, making home energy independence more accessible.
8. Mark Z. Jacobson – Professor, Stanford University
A leading advocate for transitioning to 100% renewable energy, Mark Z. Jacobson’s research at Stanford University provides a scientific foundation for policies that promote wind, solar, and hydropower as scalable energy solutions.
9. Katharine Hayhoe – Climate Scientist and Author
A professor at Texas Tech University, Katharine Hayhoe is known for her work in climate change communication. She bridges the gap between science and public policy, advocating for stronger renewable energy commitments.
10. Alex Gilbert – Director of Space & Planetary Regulation, Zeno Power
Alex Gilbert is an expert in nuclear energy, space resources, and environmental markets. At Zeno Power, he is advancing radioisotope power systems, which could provide clean energy for remote locations, including space exploration. His work also intersects with regulatory frameworks for next-generation nuclear technologies.
Climate Insider Analysis
The clean energy transition in 2025 will be shaped by both technological advancements and policy shifts. These 10 leaders represent a diverse mix of policymakers, corporate executives, researchers, and advocates who are driving progress in the sector.
- Government officials like Ursula von der Leyen and Robert Habeck are pushing large-scale renewable energy policies, influencing global energy markets.
- Industry executives such as Jigar Shah, Philipp Schröder, and Markus Krebber are scaling up clean energy deployment through financing and corporate strategies.
- Researchers and thought leaders like Martin Green and Mark Z. Jacobson provide the scientific backbone for renewable energy innovations.
- Corporate sustainability leaders like Kate Brandt and Lucas Joppa are leveraging technology to accelerate decarbonization.
- Activists and policy advocates including Tzeporah Berman and Nigel Topping continue to shape global climate discourse and push for stronger commitments.
As clean energy investment reaches new heights, these leaders will play a critical role in defining the strategies and technologies that will power a sustainable future. Following their work can provide valuable insight into the next phase of the global energy transition.
