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• David Yellen

  David W. Yellen is the Director of Climate Policy Innovation at CATF. He leads CATF’s work analyzing the global impacts of new and emerging climate policies, and how energy transition strategies intersect with geopolitical and economic imperatives across regions. David investigates and advocates for solutions to critical issues at this…

  July 11, 2022

• Holly Reuter

  Holly Reuter is the U.S. Policy Impact Director at Clean Air Task Force. Holly leads the work of CATF’s Policy Impact team to increase the impact of energy policies that support a zero-emissions, high-energy planet. This includes leading CATF’s strategies to support innovation within executive agencies and across government, overseeing…

  June 29, 2022

• Zitely Tzompa Sosa

  Zitely Tzompa Sosa joined the Methane Pollution Prevention team at Clean Air Task Force in 2022. Zitely performs direct decision-making advocacy for European legislation aimed at reducing methane emissions and supports the Methane Pollution Prevention team by analyzing and interpreting technical and scientific data on methane emissions from the oil…

  June 6, 2022

• Ghassan Wakim

  Gus is the Director of Production for the Industrial Innovation program. His work centers on assessing the technical and commercial feasibility of various decarbonization technologies and pathways in industry (refining, chemicals, fertilizer, and steel) and on supporting CATF’s advocacy on clean hydrogen’s role in decarbonization. Gus also provides insights for…

  May 31, 2022

• Nathalie Emaille-Léotard

  Nathalie joined Clean Air Task Force in April 2022 as Chief of People. Nathalie has been trained as a management consultant after obtaining her MBA and is a valuable strategic thought partner for CATF’s leadership team. She focuses on creating the environment to support organizational growth and international expansion both…

  April 18, 2022

• Jenna Hill

  Jenna Hill is the Innovation Manager for the Superhot Rock Geothermal Team at Clean Air Task Force. As Innovation Manager, she works on technology road mapping and collaborates with international partners to catalyze geothermal innovation globally. Prior to her current role, she worked at CATF as a Geoscientist and Geothermal…

  April 4, 2022

• Terra Rogers

  Terra Rogers is the Senior Director for the Superhot Rock Geothermal program at CATF.  In this capacity, Terra leads CATF’s geothermal strategy and technical team to make clean, safe, zero-carbon energy possible anytime, anywhere.  In 2022 she joined CATF to create a global vision for superhot rock and implement pathways…

  April 4, 2022

• Kait Siegel

  Kait Siegel is the Director for Waste Methane at Clean Air Task Force. Since joining the organization in 2022, she has worked to advance strategies and policies to reduce waste sector methane emissions globally. Kait also oversees CATF’s country engagement work with the Waste Methane Assessment Platform (WasteMAP). Prior to…

  March 30, 2022