Our Experts

Conservation International has leading experts in science, policy and partnerships.

© Conservation International/photo by John Martin

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Johan Rockström, Ph.D.

Chief Scientist

Johan Rockström is Chief Scientist at Conservation International. He also serves as co-director of the Potsdam Institute for Climate Impact Research, one of Europe’s leading centers for climate change and sustainability research.

Michael B. Mascia, Ph.D.

Senior Vice President, Moore Center for Science

​Dr. Michael B. Mascia leads Conservation International’s social science research and capacity-building efforts, in order to build a foundation for the next generation of conservation science and policy.

James Roth

Senior Vice President, Global Policy and Government Relations

James Roth is Senior Vice President for Global Policy and Government Relations, overseeing Conservation International’s U.S. Government Relations and International Policy teams, as well as its Distinguished Fellows Program.

Michael O’Brien-Onyeka

Senior Vice President, Africa Field Division

Michael O’Brien-Onyeka is Senior Vice President for the Africa Field Division at Conservation International. In this role, he is leading a refreshed Conservation International Africa strategy focused on sustaining the nature that Africans rely on to thrive, building on Conservation International’s successes across Africa, and leveraging the Gaborone Declaration for Sustainability in Africa (GDSA) to drive a new sustainable development paradigm across the continent.

John Buchanan

Vice President, Sustainable Production, Center for Environmental Leadership in Business

John Buchanan has held several different roles at Conservation International, focusing mainly on food and agriculture. John is currently focusing on development and implementation of sustainable agriculture and supply chain initiatives.

Emily Pidgeon, Ph.D.

Senior Director, Strategic Marine Initiatives, Center for Oceans

Dr. Emily Pidgeon works on developing solutions for coastal and marine adaptation to climate change and on marine based approaches for mitigation through “blue carbon.”