Our policy experts


  • Weaver, Scott Senior Climate Scientist

    Areas of expertise: Global and regional climate variability and change, extreme climate events, hydrologic cycle.

    Office: Washington, D.C.

  • Westfall, Katie Senior Manager, Highly Migratory Species Advocacy

    Areas of expertise: Fisheries science and management, coastal and marine policy, community organizing and advocacy.

    Office: Washington, D.C.

  • Whittle, Daniel Senior Attorney and Senior Director, Cuba Program

    Areas of expertise: US environmental law and policy, Cuban marine and coastal resources law and policy, rights-based fisheries management, marine protected areas, international government relations

    Office: Raleigh, North Carolina

  • Wiersma, Joshua Manager, Northeast Fisheries

    Areas of expertise: Fisheries Management and Policy, Seafood Markets, Natural Resource Economics, Environmental Management, Environmental Policy

    Office: Boston

  • Williams, Andrew Director, Regulatory and Legislative Affairs, U.S. Climate and Energy

    Areas of expertise: Oil & Gas law, energy finance, air quality policies, corporate engagement

    Office: Washington, D.C.

  • Areas of expertise: Federal environmental and energy regulation, the Clean Air Act, emissions standards for the oil and gas sector

    Office: Boulder, Colorado

  • Wolfe, David Director, Conservation Strategies

    Areas of expertise: conservation biology, conservation of at-risk species, working effectively with private landowners, Safe Harbor, Farm Bill

    Office: Austin, Texas

  • Worthington, Baroness Bryony Executive Director, Europe

    Areas of expertise: Climate policy, carbon budgets, emissions trading and carbon markets, energy policy, fisheries management, clean energy technologies, European policy making and politics.

    Office: Europe

  • Zakaria, Rama Senior Manager, Regulatory Policy & Analysis

    Areas of expertise: Federal energy and environmental regulation, wholesale power markets, carbon pollution from the power sector

    Office: Washington, D.C.

  • Zalzal, Peter Special Projects Director and Lead Attorney

    Areas of expertise:

    Office: Boulder, Colorado

  • Zayas del Rio, Gabriela B. Research Analyst, Office of Chief Scientist

    Areas of expertise: Air quality, clean energy, emerging science, environmental justice

    Office: New York City

  • Zerrenner, Kate Senior Manager, Energy-Water Initiatives

    Areas of expertise: Energy efficiency, climate change, energy-water nexus

    Office: Austin, Texas

  • Zhang, Jianyu Chief Representative, China Program

    Areas of expertise: China, emissions trading, green supply chain, environmental enforcement, China environmental and climate policy, China power sector

    Office: Beijing, China