REFRIGERANT EMISSIONS ELIMINATION FORUM
REFRIGERANT EMISSIONS ELIMINATION FORUM
Board of Directors
We're volunteers with backgrounds in refrigerants, energy management, and corporate sustainability. We're organizing REEF because we believe corporate buyers can drive much-needed action on refrigerants.
Tristam Coffin
is a Co-Founder and President at êffecterra, inc. a Public Benefit Corporation that provides sustainability technical support to companies, investors, government entities and their partners. Prior to êffecterra, he spent the majority of his career implementing sustainability and environmental initiatives as Director of Sustainability & Facilities for Whole Foods Market. He is a LEED AP and sustainability leader with expertise in multiple areas including high performance buildings, advanced refrigeration/HVAC systems, renewable energy, and waste diversion. He also co-founded the North American Sustainable Refrigeration Council (NASRC).
Kristen Taddonio
is a dedicated climate and energy efficiency professional specializing in reducing refrigerant emissions and helping people save money while protecting the planet. Her decades of experience span public and private sectors, including leading commercial building energy efficiency partnerships at the U.S. Department of Energy, heading sales and marketing for Energy Star appliance programs, reducing refrigerant emissions at the U.S. Environmental Protection Agency, serving as senior climate and energy advisor at the non-profit Institute for Governance & Sustainable Development, and consulting on Montreal Protocol Kigali Amendment HFC phasedown implementation in developing countries for the World Bank. She lives in Fraser, Colorado, in a net-zero energy house that won the 2020 Department of Energy Solar Decathlon build challenge competition.
Mike Armstrong
is the President and Managing Director of A-Gas in the Americas. In this role, Mike is responsible for strategy development, business execution, and technology deployment in the rapidly growing Americas marketplace. Mike joined the Americas team in 2016, as its first Chief Operating Officer, and assumed leadership responsibilities as the President of A-Gas in the Americas in 2017. Prior to that, Mike served for over 15 years in a variety of Engineering, Commercial, and Operational leadership roles with Linde, a global leader in the industrial gas market. Mike holds a Master of Business Administration from the Kellogg School of Management at Northwestern University, a Bachelor of Science from the United States Military Academy at West Point and served 6 years as an active-duty Army Officer in Europe and the United States.
Zoe Dawson, Interim CEO
is a seasoned sustainability leader with over two decades of experience advancing energy efficiency, decarbonization, and refrigerant management initiatives. Zoe serves as the Technical Sustainability Program Leader at êffecterra, inc. a public benefit corporation where she supports industrial, institutional, and commercial clients achieve their sustainability goals through strategic refrigerant asset management planning and implementation. Prior to êffecterra, Zoe spent over a decade at VEIC, where she played a key role in leading statewide energy efficiency programs and utility-led R&D pilots focused on optimizing energy use, reducing energy burdens for low-income customers, and advancing emerging technologies. As a skilled business leader and strategic planner, Zoe is passionate about fostering cross-sector collaboration and building impactful partnerships to accelerate climate solutions.
Ramé Hemstreet
is a senior adviser to Kaiser Permanente’s SVP of Facilities, overseeing infrastructure projects, reducing total cost of ownership, and advancing sustainability initiatives. As Chief Energy Officer, he leads the organization’s energy and water strategy, driving efficiency, resiliency, and carbon reduction—culminating in Kaiser Permanente’s carbon-neutral certification in 2020. Previously, Ramé served 29 years in the U.S. Navy, concluding as Commanding Officer of Naval Facilities Engineering Command Washington, D.C. He holds advanced degrees from UC Berkeley, the National War College, and Tulane University, along with executive training from Harvard and UVA Darden Business School. A licensed engineer and certified energy manager, he sits on UC Global Climate Leadership Council and was Healthcare Design Magazine Owner of the Year in 2021.
Lisa Murray
is a leader with proven ability to dynamically build out, strengthen and execute sales, market and organizational strategies for world-class companies. She has over a decade of experience in the refrigeration industry focused on reducing energy and refrigerant use in commercial refrigeration systems, go-to-market planning and execution, and developing successful strategic partnerships. Lisa also has experience helping the solar industry in the Southeast develop momentum during her time at the early-stage non-profit Georgia Solar Energy Association. In addition to her work with REEF, Lisa is an active consultant helping small- to medium-sized businesses with growth strategies.
Heather Clark
led the all-of-government mobilization to transition the U.S. building sector to zero emissions as Senior Director for Building Sector Climate Policy at the White House—advancing federal investments and partnerships to create clean manufacturing jobs and transform our built environment. Heather has also been at the forefront of some of the most innovative decarbonization projects in the U.S., from her leadership at RMI on the Inflation Reduction Act and her work at Biome Studio where she pioneered ambitious decarbonization and clean energy projects to benefit underserved communities. Her deep technical expertise—paired with her leadership in policy, real estate development, and clean energy—makes her a tremendous asset to REEF as we work to eliminate refrigerant emissions and scale sustainable HVAC tech.
