Our People

Martin Callow

Acting Portfolio Lead, Nature Bonds

London, United Kingdom

Headshot of Martin Callow.

Martin Callow Acting Portfolio Lead, Nature Bonds © TNC

Areas of Expertise

Conservation, Conservation Finance, Innovative Climate and Biodiversity Finance

Scheduling Contact

Debora Gillespie
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Biography

Martin Callow is an experienced conservation leader with over two decades of experience designing and implementing science-based, participatory conservation strategies across diverse geographic and cultural contexts. He has worked with high-performing, distributed teams and a broad range of stakeholders—including governments, Indigenous and local communities, private sector partners, NGOs, and academia—to develop and deliver collaborative solutions for people and nature.

His work has spanned the UK, Southeast Asia, the Western Pacific, the Western Indian Ocean, and Central Africa, with a focus on issues including protected and conserved area management, Nature-based Solutions, illegal wildlife trade, coastal fisheries, and innovative climate and biodiversity finance. Martin played a pivotal role in the Seychelles' debt restructuring and the launch of the world’s first blue bonds project to support marine conservation and sustainable fisheries. Driven by a commitment to inclusive leadership, collaboration, and innovation, he is motivated by the vision of achieving sustainably financed conservation outcomes that are locally grounded and globally impactful.

Martin holds degrees in Environmental and Marine Sciences, as well as an Executive MBA with a focus on Strategy, Design Thinking, and Impact Capital. He joined TNC as Conservation Director for the Nature Bonds program, and currently also holds the role of Acting Portfolio Lead, overseeing the strategic delivery of sovereign debt transactions that unlock large-scale finance for conservation and climate goals.

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