Our Team
Combining passion with deep expertise to deliver tailored sustainability and carbon advisory support.
Natasha Rothbucher-Thomas
Engineering Leader & Climate Innovation Entrepreneur
Multi-disciplinary engineering leader with over 18 years of experience delivering sustainability, low-carbon innovation, and decarbonisation strategies across construction, real-estate, energy, waste, water, forestry, agriculture, materials, and finance—primarily in emerging markets.
Brings extensive experience navigating technical, cultural, political, and social challenges to drive knowledge transfer and innovation adoption.
Previously held leadership roles in sustainability fintech and water treatment start-ups, guiding R&D and engineering development through Technology Readiness Levels.
Spent nine years in Brazil, including serving as Technical Advisor to Sinduscon-BA (Chamber of Construction), representing industry on government boards and managing the AQUA-HQE certified headquarters project.
FOUNDING CHIEF EXECUTIVE OFFICE
A business developer who has worked in the renewable energy sector for the past 6 years. He built and sold a market-leading property business to his employees. John has experience in fast-moving businesses seeking to engage in transformational change, where he has demonstrated the ability to make high-quality, low-risk decisions in a team environment.
director of operations John Gotley
Carbon specialist with three years’ experience in carbon accounting and carbon modelling, delivering carbon projects and developing integrated carbon and financial models, alongside compiling comprehensive GHG inventories. She holds a PhD from Imperial College London focused on the biogeochemistry of global carbon cycles, underpinning her applied work in climate and sustainability.
Carbon analystDr Hollie Packman
Caspar Fish
Caspar brings four years’ experience in carbon markets, specialising in in-depth research, feasibility studies, project management, and the development of internationally aligned certification documentation, including Project Design Documents (PDDs). He supports projects across their full lifecycle.
Research analystOur Business Development Partners
Alex Gotley
Alex Gotley is a carbon project developer and business development specialist focused on scaling high-integrity climate solutions across Africa. Alongside his role supporting African expansion at RadiusZero, he is Director and Co-Founder of Criou, where he leads the development and delivery of biochar carbon removal projects in East Africa, building strategic partnerships and implementing CSI-endorsed methodologies across diverse biomass feedstocks such as Prosopis, avocado seeds and pineapple waste. His experience spans circular agri-processing innovation, modular anaerobic digestion, renewable project development and construction management.
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Paulo Menzel
As President of CÂMARALOG – the Brazilian Chamber of Logistics and Infrastructure – and CEO of the Intelog Group, Paulo Menzel operates at the intersection of governments at various levels, the private sector, and the third sector, working in industry, commerce, services, and sustainable development, with governance and compliance functions in various strategic councils, commissions, and committees covering infrastructure, logistics, and private institutions. His extensive network of contacts and institutional credibility enable coordinated partnerships and the large-scale implementation of complex initiatives. For RadiusZero, Menzel provides influential communication, policy alignment, and intersectoral engagement that strengthen the delivery of solutions in the international regulated carbon market.
BRazil
Sergio RF Ribeiro is a valued partner with extensive experience in innovation, sustainability and technology-driven development across Brazil. His work connects research, investment and practical implementation to deliver meaningful environmental and social impact. Sergio leads Vera Cruz Monitoramento, Pesquisas e Experimentos Científicos S/A, a Brazil-based company advancing initiatives in clean energy, carbon reduction, digital education and life-science technologies in collaboration with organisations such as Google, Samsung and EMBRAPA. Through its close link with the Instituto Vera Cruz de Desenvolvimento (IVCD), these efforts also support digital transformation in public education and sustainable urban innovation, reflecting a shared commitment to long-term, inclusive progress.
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