Meet Our

Team

Nigel Purvis

CEO

Nigel Purvis

Nigel Purvis is an American diplomat, business and non-profit executive, think tank scholar and international lawyer. Over three decades, Nigel has shaped U.S. and global policy while serving in decision-making roles at a wide variety of globally influential organizations in Washington, DC.
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Claire Langley

Vice President, Programs

Claire Langley

Claire Langley is Vice President of Programs at Climate Advisers. Claire’s expertise includes international climate & energy policy and diplomacy and international political climate change strategy.
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Rosaria Leong

Chief Financial Officer

Rosaria Leong

Rosaria Leong, as Chief Financial & Administrative Officer (CFAO) at Climate Advisers, is responsible for the company’s financial functions, including corporate finance, treasury, accounting, and audit, and oversees human resources.
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Peter Graham

Managing Director, Policy and Research

Peter Graham

Peter Graham is Managing Director of Policy and Research at Climate Advisers, where he specializes in forests and land issues.
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Ben Simonds

Managing Director, Communications

Ben Simonds

Ben Simonds is a Managing Director at Climate Advisers and serves as the group’s the Director of Communications, where he designs and executes CA’s communications strategies and is working to grow its communications consulting practice.
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Matt Piotrowski

Senior Director, Policy and Research

Matt Piotrowski

Matt Piotrowski is the Senior Director of Policy and Research at Climate Advisers, focusing on communication outreach with the financial sector, managing the Chain Reaction Research initiative, and providing analysis for investors to mitigate climate risks.
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Mumukshu Patel

Senior Director, Food and Agriculture

Mumukshu Patel

Mumukshu Patel leads the Food and Agriculture practice at Climate Advisers, which seeks to enable a more sustainable food system, leveraging innovation, diplomacy, and advocacy to help lower its greenhouse gas emissions.
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Natasha Ferrari

Senior Director, Communications

Natasha Ferrari

Natasha is a Senior Director of Communications at Climate Advisers. She is helping lead the company’s growing communications practice, which combines strategic communications with deep expertise on climate change issues.
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Niamh McCarthy

Director of Climate-Related Risk and Orbitas

Niamh McCarthy

Niamh McCarthy is Director of Climate-Related Risk at Climate Advisers and leads the Orbitas initiative, where she specializes in financial transparency, data analytics, and sustainability.
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Kyle Saukas

Deputy Director, Communications

Kyle Saukas

Kyle Saukas is a Deputy Director, of Communications at Climate Advisers, where he focuses on executing strategic communications projects and strengthening the Climate Advisers brand.
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Joshua McBee

Deputy Director, Policy and Research

Joshua McBee

Josh McBee is a Deputy Director of Policy and Research at Climate Advisers, where he works on international climate policy, diplomacy projects, domestic U.S. energy/environmental policy and politics, and mitigation opportunities in food and agriculture.
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Mark Kenber

Senior Fellow, Orbitas

Mark Kenber

Mark Kenber is a Senior Fellow at Climate Advisers where he leads the project Orbitas. Mark has worked on environment, climate and energy issues for over two decades, in government, NGOs and the private sector.
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Alexandre Koberle

Senior Fellow, Orbitas

Alexandre Koberle

Dr Alexandre Köberle is a Senior Fellow at Climate Advisers and Orbitas, and is an Advanced Research Fellow at the Grantham Institute at Imperial College London.
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Michael Obersteiner

Senior Fellow, Orbitas

Michael Obersteiner

Michael is a Senior Fellow at Climate Advisers and Orbitas, and is the Director of the Environmental Change Institute, University of Oxford.
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Dan Reifsnyder

Senior Fellow

Dan Reifsnyder

Dan Reifsnyder is a Senior Fellow at Climate Advisers, where he advises the organization's strategic initiatives.
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Jen Stebbing

Senior Fellow, Communications

Jen Stebbing

Jen Stebbing is a Senior Fellow at Climate Advisers where she offers support and strategic advice to the communications team.
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Bruce Searby

Special Counsel

Bruce Searby

Bruce Searby serves as Special Counsel to Climate Advisers. In that role, he serves as Climate Advisers’ thought leader and expert on how to use U.S. and international laws to advance climate action.
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Simone Schonenberger

Human Resources Manager

Simone Schonenberger

Simone Schonenberger is the Human Resources Manager at Climate Advisers, where she oversees all aspects of the group's most valuable assets, its people.
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Gunther Korshak

Development & Grants Manager

Gunther Korshak

Gunther Korshak is the Development and Grants Manager at Climate Advisers, where he works to develop strategic partnerships that advance Climate Advisers’ mission and principal practice areas.
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Kyra Althaus

Senior Associate, Communications

Kyra Althaus

Kyra Althaus is a Senior Communications Associate at Climate Advisers where she focuses on enhancing the group’s strategic communications projects.
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Cathy Wu

Senior Associate, Climate-Related Risk

Cathy Wu

Cathy Wu is Senior Associate of Climate-Related Risk at Climate Advisers, where she works on economic and financial modeling, data analytics, and sustainability.
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Nitya Aggarwal

Policy & Communications Associate

Nitya Aggarwal

Nitya Aggarwal is a Policy and Communications Associate where she works closely with both the Policy & Research and Communications teams.
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Alec Estabrook

Associate, Climate-Related Risk

Alec Estabrook

Alec Estabrook is a Climate-Related Risk Associate at Climate Advisers, where he works on financial transparency, data analytics, and sustainability within the Orbitas team.
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Anna Mervosh

Executive & Program Assistant

Anna Mervosh

Anna Mervosh is an Executive and Program Assistant at Climate Advisers, where she supports the Operations and Programs teams.
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Our team of experts draws from the worlds of politics, policy, finance, communication, international diplomacy and corporate strategy to advance climate action in the US and around the world.