Martin Hiller is a founding partner of Millwater Partners and the international lead for climate change, energy, and sustainability business development. He is a certified GRI expert and advisor for the development of ESG accounting software.
From 2012 to 2019, Martin was Director General of the Renewable Energy and Energy Efficiency Partnership, an international organisation that develops innovative, efficient financing mechanisms for clean energy services for the benefit of vulnerable populations. He transformed the organisation into a developer of innovative market interventions while building a highly professional team.
Under his auspices, REEEP developed the Beyond the Grid Fund for Zambia (BGFZ) programme, funded by the Government of Sweden; by March 2020, this award-winning programme had provided electricity access to 800,000 Zambians or 154,000 households in just over two years. BGFZ also led to the creation of 1,700 jobs, an annual mitigation of 380,000 tons CO2, and the four benefitting energy access companies leveraged co-investment of USD35m.
Before his tenure at REEEP, Martin led campaigns and communications of the global climate change programme at WWF International. His work included the WWF campaign for a binding climate deal at the UN Climate Summit in Copenhagen in 2009, which gained 6.5 million sign-ups.
He was the Founding President of the Board of the Gold Standard Foundation – the certifier of excellence for climate change, carbon offset, and development interventions. Under his guidance, the organization grew from an idea to a highly credible and sustainable global operation. From 2016 to 2023, he was a member of the Board of Nexus for Development, a non-profit company registered in Singapore and based in Cambodia. 
Martin studied biology and ecology in Vienna, has lived in Switzerland, Belgium and Austria, and currently tests his sustainability strategies by trying to convince some pak choi to grow in his garden.