Experts & Staff


WRI’s experts are leaders in their fields. Their work spans topics such as food and land use, energy, cities, climate, economics, finance, governance and more.

Our more than 2,000+ staff work on the ground in more than a dozen focus countries and with partners in over 50 nations. Contact our media team to arrange an interview with any of our experts.

Program Experts & Staff

Ettore Arpini

Director for Strategy and Impact, WRI Brasil

Ettore Arpini.

Jonah Busch

Senior Environmental Economist, Cities4Forests, Natural Infrastructure

Jonah Busch

Clemens W. Janssen

User Research & Engagement Lead

Clemens Janssen.

Yuke Kirana

Research Associate, Systems Change Lab

Yuke Kirana

Anne Maassen

Senior Urban Research, Knowledge & Learning Manager, WRI Ross Center for Sustainable Cities

Anne Maassen

Kirian Mischke-Reeds

Research Analyst, Raising National Climate Ambition

Kirian Mischke Reeds.

David Pérez-Barbosa

Global Data Coordinator

David Pérez Barbosa

Katharina Wache

Research Analyst, Corporate Water Stewardship

Katharina Wache