Martin Callow
Global Strategy Lead, Nature Bonds
London, United Kingdom
Martin Callow Global Strategy Lead, Nature Bonds. © TNC
Areas of Expertise
Conservation, Conservation Finance, Innovative Climate and Biodiversity Finance, Partnerships
Biography
Martin Callow is a conservation leader with more than two decades of experience designing and implementing science-based, sustainably financed conservation strategies across diverse geographic and cultural contexts. He has worked with 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 has lived in Myanmar, Fiji, Singapore and Seychelles, where he played a pivotal role in Seychelles' debt conversion that led to the protection of 1.35 million square km of Indian Ocean 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 in 2025, and in 2026 became the global strategy lead, overseeing the Nature Bonds portfolio, from the development of new projects to the implementation of closed transactions that unlock large-scale finance for conservation and climate goals.