Our full-time staff is complemented by a range of associate seasoned sectoral experts. We take an interdisciplinary approach to bringing the most knowledgeable professionals to deliver high added value.
Olivier Levallois
Founding Director & CEO
Olivier has been helping NGOs, climate funds & corporates navigating and benefiting from the compliance and voluntary carbon markets and climate finance since 2009.
Guy Warren
Managing Director, UK
Guy is a qualified lawyer and forester. His work with our investor and corporate clients affords him a deep understanding of climate finance markets, deal structuring and project due diligence.
Francisco Macedo
Associate Director
Francisco has over 7 years of experience in strategy consulting and climate finance. He holds a double Master's Degree in Sustainable Forest and Nature Management and a Master's in Corporate Sustainability.
Shevanti Nefdt
Senior Consultant
Shevanti has an extensive foundation in biology and ecology, as well as a strong environmental policy background. She has delivered HAMERKOP work in the field around the world.
Michael Tye
Consultant
Michael has degrees in economics and environmental management and supports international emission reduction projects related to renewable energy and afforestation. He specialises in biochar.
Maëna Raoux
Consultant
Maëna holds an MSc in Climate Change, Management, and Finance from Imperial College London. She also has experience working as a Sustainability Analyst at a leading agency in Paris.
Caitlin McCreight
Consultant
Caitlin holds an MSc Climate Change, Management & Finance from Imperial College London. Her focus is nature-based projects as well as carbon market strategy & policy work.
Zak Jacobs
Consultant
Zak holds a BSc in Forestry Science. He has extensive experience in forestry, carbon, and sustainable resource management.
Paul Stouffer
Climate Communications Lead
Paul earned an MA from the University of the Arts London, where he studied sustainable design. He is passionate about combining design with science to improve public engagement with social and environmental issues.
Dr Géraldine Bouveret
Managing Director, Singapore
Géraldine holds a PhD in Mathematics and is an expert in sustainable finance and NbS, applying quantitative risk modelling to assess transition risks and support climate-aligned investment strategies.
Judith Becker
Head of Strategy & Operations
Judith previously served as the Chief Operating Officer of a policy-led communications consultancy and has significant experience supervising Finance, HR, IT, Marketing, and Business Development teams.
Christophe Boyer
Associate Director
Christophe has degrees in Ecological Restoration and Forest & Conservation Sciences. He has worked on a number of conservation and restoration projects and is passionate about indigenous-led forest resource management.
Colin Green
Senior Consultant
Colin has over 12 years of international experience in sustainability consulting, driving solar innovation, and facilitating carbon finance registration around the world.
Tatiana de Liedekerke
Senior Consultant
Tatiana has a background in Climate Change, Management, and Finance, as well as Political Studies. She is passionate about using carbon finance to improve the resilience of vulnerable communities and ecosystems.
Hazel Herbst
Consultant
Hazel holds a dual MSc in Global Change, Ecosystem Science and Policy from UCD, Ireland and JLU, Germany. She has extensive experience researching and measuring socio-ecological systems and restoration efforts and is passionate about community-led conservation.
Solène Kechavarzi
Associate Consultant
Solène holds a master's degree in Biodiversity and Conservation from UCL. Her research has focused on modeling ecosystem services and predicting the impacts of climate change.
Abbey Douglas
GIS Specialist
Abbey holds an MSc in Geology and is a geospatial specialist with a strong background in geology, remote sensing, and GIS.
Where We Work
100+ organisations served across 50+ countries (and counting)
OUr Experience
Our experts are passionate about helping organisations with ambitious programmes. We have strong technical expertise and commercial focus.
Our experts have experience working at HAMERKOP with private project developers and commodity trading houses, public institutions (e.g. European Union, World Bank, AFD, SNV, GGGI), and NGOs (e.g. Practical Action, Clean Cooking Alliance, Oxfam International, Blue Ventures, IUCN).
We have a strong understanding of international regulations, sources of funding, innovative financing mechanisms, development issues and international organisation requirements. We follow international climate change negotiations and initiatives on a continuous basis to better inform our clients on their next steps. We care for our clients to take commercial advantages from their actions when relevant.
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