Meet Our Team
ICLEI USA is staffed by experienced leaders and climate and resilience specialists committed to your success.
Angie joined ICLEI USA in 2014 as the Director of Resource Efficiency and Renewable Energy. She was promoted to Executive Director on January 1, 2016 and as such is a member of ICLEI’s global senior management team.
Since 1990, ICLEI has built and served a movement of local governments pursuing deep reductions in carbon pollution and tangible improvements in sustainability and resilience. ICLEI is the world’s leading network of over 1,500 cities, towns and metropolises, providing hands-on assistance with technical experts located in 17 global offices.
Angie’s strategic vision for the organization is to create exceptional value for ICLEI local government members, partners, and funders by harnessing the power of the ICLEI network and to build on ICLEI’s unique global role as the focal point for local governments in the United Nations Framework Convention on Climate Change (UNFCCC).
With a focus on climate finance and the implementation of the Paris Agreement, she aims to weave health and equity considerations into ICLEI USA offerings based on her interest in human-centered design.
Angie’s previous experience includes serving as the Associate Director of the Colorado Governor’s Energy Office, where she was part of the team to develop and implement 57 pieces of clean energy legislation under Governor Bill Ritter, as the executive director of the U.S. Green Building Council Colorado Chapter, and as a Real Estate Product Manager of global corporate relocation services firm.
Anna Tiajoloff joined ICLEI USA in 2020 as a Programs Associate. As a Programs Associate, Anna provides assistance to the Communications and Programs teams. She helps spread awareness of ICLEI USA’s role in local government sustainability and its member outreach while supporting greenhouse gas emissions cohorts, inventories, and projects.
Anna received her Bachelor’s degree from Skidmore College in Environmental Studies, concentrating in the intersection between human rights and environmental sustainability with a minor in Fine Arts. She studied coastal ecology and natural resource management in Zanzibar, Tanzania researching the social and environmental impacts of salt and seaweed farming on women in the Zanzibar Archipelago. For her bachelor’s capstone, she assessed Skidmore College’s pollinator sustainability and evaluated the logistical, economic, and sustainable feasibility of adopting pollinator initiatives and designation.
Calyn Hart joined ICLEI USA in 2018 as a Program Associate, supporting the Statewide Energy Efficiency Collaborative (SEEC), and currently serves as a Program Officer to support local governments in the pacific northwest and southwest regions. Calyn provides technical assistance to local governments for greenhouse gas inventorying, forecasting, climate action planning and monitoring using the ClearPath tool and the Land Emissions And Removals Navigator (LEARN) tool. Calyn also supports communities implementing nature based solutions, increasing biodiversity and incorporating climate equity throughout the climate action planning process.
Calyn received her bachelor’s degree in Environmental Business and a minor in Biology in 2017 from the University of Redlands in Southern California. After graduating, Calyn joined the CivicSpark Fellowship program to support the City of Santa Clara’s climate action goals. While supporting the City of Santa Clara, Calyn updated the City’s LGO and Community- wide GHG inventories, produced the City’s Climate Action Plan Annual Report, provided the framework for a Transportation Demand Management Plan, implemented the City’s Pilot Residential Food Scraps Recycling Program and the County’s Green Business Certification Program.
Senior Program Officer
Eli Yewdall is a Senior Program Officer developing resources to help local governments measure, manage and reduce greenhouse gas emissions. Eli supports ongoing development of ICLEI’s protocols, tools, and guidance and training materials in the areas of greenhouse gas inventories, forecasting, and climate action planning. Eli also leads ICLEI’s work engaging local governments in the development process for improved building energy codes.
Before joining ICLEI, Eli worked for two years as a full-time volunteer with St Joseph’s House of Hospitality in Rochester, NY to provide meals and shelter to and advocate on behalf of homeless individuals. Eli has also produced educational materials on climate change for the Environmental Justice and Climate Change Initiative. Eli has a Masters in Energy and Resources from the University of California, Berkeley, and a BS from Gonzaga University.
Jesse provides technical assistance to ICLEI members on resilience and adaptation planning.
Before joining ICLEI, Jesse worked for the Federal Emergency Management Agency (FEMA) Region 9 as a Hazard Mitigation Planner. In this role, she provided technical assistance to local, tribal, and state agencies on hazard mitigation and climate adaptation planning, and reviewed plans for consistency with federal grant requirements. Prior to FEMA, Jesse was an Environmental Planner with Rincon Consultants, where she conducted environmental impact analyses for proposed projects and quantified greenhouse gas emissions for various sustainability initiatives. She has a Master of City and Regional Planning degree from Cal Poly State University, and a B.A. in Economics from Humboldt State University. When she’s not working, she is probably riding her bike, playing music, or reading a book in the company of her cat-children, Jordy and Josie.
Zero Carbon Cities Advisor
Josh is a sustainability and decarbonization consultant and educator working across the clean energy and built environment spectrum. He is currently working with ICLEI as a Zero Carbon Cities advisor, supporting the Race to Zero campaign.
Josh is also the Renewable and Sustainable Energy Specialization lead within the Masters of the Environment (MENV) program at CU Boulder as where he teaches and advises. He also works an as an independent consultant on various district scale sustainable development projects with a focus on electrification, distributed energy, and grid interactivity.
He was recently the head of WSP’s Built Ecology practice and has worked on a range of horizontal and vertical sustainable buildings and infrastructure projects across the US and internationally, pursuing high level sustainability goals such as Net Zero Energy and Carbon, WELL, and LEED certification. Josh was a co-founder of the sustainability group YR&G, was a co-founder of the advocacy group GreenHomeNYC. He was co-chair of the ULI Colorado Healthy Places Committee and is a LEED Fellow. He holds Masters’ degrees in Mechanical and Electrical Engineering from the Royal Institute of Technology in Stockholm and Columbia University in New York.
Senior Program Officer
Kale joined the ICLEI USA team in 2016 to provide technical assistance to ICLEI members on greenhouse gas emission inventories, sustainability and climate action planning, and to develop climate vulnerability assessments. Since 2018, he has worked as network coordinator and communications lead while serving as a U.S. local government liaison to the United Nations.
Before joining ICLEI USA, Kale worked with the United Nations Development Programme’s Climate Change Adaptation Team from the Bangkok Regional Hub. He supported countries throughout the Asia-Pacific region to develop proposals aimed at unlocking climate finance for adaptation projects. Kale also is a former editor of Mother Earth News, North America’s largest sustainable living magazine, where he coordinated climate and energy content. From 2010 to 2012, he served as a U.S. Peace Corps volunteer in rural Thailand, where he worked on a project with the Thai Ministry of Energy to build home-scale biogas digesters and initiate carbon accounting in community forests. Kale received an M.S. in Climate Science and Policy from the Bard Center for Environmental Policy and a B.S. in Environmental Science from Humboldt State University.
Matthew Katz joined ICLEI USA in 2019 as a Graduate Fellow providing technical assistance for Colorado regional climate action efforts and the American Cities Climate Challenge. As a Program Associate, Matthew provides technical assistance to ICLEI members on GHG inventory and emissions forecasting using the ClearPath tool. Additionally, he assists in developing an ICLEI-led Americorps service program in which members will collaborate with Colorado local and regional governments to advance climate, resilience, and sustainability initiatives.
Matthew received his Bachelor’s Degree in Sustainability Studies and a minor in Geography and Geographic Information Science from the University of Illinois at Urbana-Champaign. After, Matthew received a Master of Science in Environmental Policy and Management from the University of Denver.
Climate Communications Associate
Sarah Ditton joined ICLEI USA in 2020 as the Climate Communications Associate. Sarah is spreading awareness of ICLEI USA’s cutting-edge service, tools, and network.
Before joining ICLEI USA, Sarah worked for the Boulder Housing Coalition, where she ran successful fundraising campaigns and improved staff efficiency. Additionally, Sarah was the Chair of the Boulder County Food Waste Committee. Sarah received a Masters of the Environment (M.E.N.V.) specializing in Sustainable Food Systems from CU Boulder. For her Master’s Capstone, she worked with the City of Boulder Climate Initiatives Team to run a county-wide Food Waste Awareness Week and suggest novel programs and policies to reduce the amount of wasted food. Sarah received a B.A. in Biological Sciences specializing in Microbiology from Cornell University. For fun, Sarah reads, dances, plays ultimate frisbee, and frolics with her dog.
Senior Program Officer
Tom Herrod provides technical assistance to ICLEI members specializing in low-emissions development, circular development, and nature-based development.
Tom Herrod joined ICLEI USA after 10 years working for the City & County of Denver’s Climate Action Team. As a Climate Policy Analyst, Tom worked to update Denver’s greenhouse gas inventory to be GPC- and CRF-compliant. Under Tom’s guidance, Denver received Global Covenant of Mayors Compliant Status as well as a Leadership ranking from CDP. Using GHG data, Tom successfully brought a number of initiatives to Denver, including the City Energy Project, while also managing Denver’s Energy Efficiency & Community Block Grant Program. Most recently, Tom led Denver’s 80×50 Climate Goal Stakeholder and Community Input Process, leading to a number of interim goals, targets, and strategies to achieve Denver’s Climate Goals.
Tom has over 20 years of experience working in local, state, tribal, and federal environmental programs, including 5 years with the U.S. Environmental Protection Agency’s Office of Inspector General. Tom received his bachelor’s degree in Natural Resources from the University of Nebraska, and a master’s degree in Environmental Policy & Management from the University of Denver. Tom also completed doctoral research in Aquatic Resources at Texas State University.
Tom’s other interests include applying wetland restoration and regenerative agriculture practices at a family ranch in western Nebraska.