Our advocacy experts


  • Kaiser, Dan Director, Conservation Strategies

    Areas of expertise: Environmental markets, agriculture sustainability, water quality, non-point source pollution

    Office: San Francisco

  • Karas, Natalie Senior Director and Lead Counsel, Energy Markets & Utility Regulation

    Areas of expertise: Natural gas and electricity market design, natural gas policy, utility regulation

    Office: Washington, D.C.

  • Kelly, David Senior Manager, North Carolina Political Affairs

    Areas of expertise: Clean energy, energy efficiency, environmental markets, agricultural sustainability, shale gas development and production, and public policy

    Office: Raleigh, North Carolina

  • Keohane, Nathaniel Former Senior Vice President, Climate

    Areas of expertise: Carbon markets, economics, climate change, U.S. and global climate and energy policy

    Office: New York City

  • Kiely, Pam Associate Vice President, U.S. Climate

    Areas of expertise: U.S. climate and energy policy, carbon markets, legislative and regulatory strategy, subnational policy

    Office: Boulder, Colorado

  • Kizzier, Kelley Vice President for Global Climate

    Areas of expertise:

    Office: Remote

  • Koehler, Larissa Senior Attorney, Energy

    Areas of expertise: California energy law and policy, electric transportation, UK transport and air quality policy

    Office: San Francisco

  • Kritee, Kritee Senior Scientist

    Areas of expertise: Climate smart agriculture, Soil carbon, Soil Health, Rice, Methane and nitrous oxide emissions, Nitrogen & Water use efficiency, Environmental microbiology, Stable isotope biogeochemistry, and Mercury pollution

    Office: Boulder, Colorado

  • Kuzdas, Christopher Project Manager, Water Program

    Areas of expertise: Water management and governance; public policy; decision support; social-ecological systems; risk management; rural development and planning

    Office: Remote

  • Levitan, Ben Senior Attorney, Legal and Regulatory

    Areas of expertise: federal environmental and energy regulation, Clean Air Act, climate pollution from the power sector

    Office: Washington, D.C.

  • Leyden, Colin Director, Regulatory & Legislative Affairs

    Areas of expertise: Oil and gas, energy policy, ground-level ozone and air quality

    Office: Austin, Texas

  • Liu, Hongming Manager, Global Climate Change

    Areas of expertise: Carbon pricing; international aviation and shipping; Chinese carbon markets; international climate policy; offsetting mechanism.

    Office: Beijing, China

  • Lord, Oliver Head of Policy and Campaigns

    Areas of expertise: Air quality, transport emissions, sustainable travel, electric vehicles and charging infrastructure, transport planning.

    Office: Europe

  • Lujan, Breanna Project Manager, Forest and Climate Policy

    Areas of expertise: Zero-deforestation supply chain commitments, REDD+, climate change, deforestation mitigation in the Amazon, land sector issues

    Office: Europe

  • Mahoney, Melissa Manager, Oceans Technology Solutions

    Areas of expertise: Fisheries Management/policy, human dimensions of fisheries, collaborative fisheries research, electronic monitoring, visual communications

    Office: Remote

  • Mathers, Jason Director, Vehicles & Freight Strategy

    Areas of expertise: Freight electrification, fleet vehicles, green supply chain

    Office: Boston

  • McCahan, Graham Senior Attorney, U.S. Climate & Air – Legal & Regulatory

    Areas of expertise: Clean Air Act, climate change, and air quality.

    Office: Boulder, Colorado

  • McCormick, Lindsay Program Manager, Chemicals and Health

    Areas of expertise: Environmental Health, Chemical Safety, Children’s Health

    Office: Washington, D.C.

  • McDow, Will Director, Resilient Landscapes

    Areas of expertise: environmental markets, mitigation policy, working lands conservation

    Office: Raleigh, North Carolina

  • McLellan, Eileen Lead Senior Scientist

    Areas of expertise: Water quality, watershed protection and restoration, ecological resilience, land use planning, rural development, environmental policy

    Office: Washington, D.C.