Our mission is to catalyze the Jewish people and the state of Israel to improve our performance on climate.
What does this look like?


We’re here to leverage the strength and ingenuity of the Jewish people and Israel. We focus on mitigation, adaptation and innovation. 
We believe that the Jewish people and Israel can and should punch above our weight on climate.


We will succeed if Israel and the Jewish people are making a significant positive contribution–improving our own performance, and working in partnership with others to make a difference globally.

How do we effect change?

We are a think-and-do tank. We mobilize wealth, wisdom, and networks to effect change in three ways:
RESEARCH

Working proactively to ask big questions, and to find mechanisms and partners to drive significant positive change.

STRATEGIC VENTURE PHILANTHROPY

Strategic means being data-driven and focused on solving big problems. Venture means we’re willing to take risks, working with a range of partners to establish new projects, coalitions or organizations. We ask not only how likely the work is to succeed, but also how much it will matter if it does.

ENGAGING JEWISH LEADERS

Most Jewish leaders agree that we must address the climate crisis. But its complexity can seem overwhelming. We’re here to listen and learn – and to offer credible, specific pathways to effect change.

RESEARCH

Working proactively and persistently to ask big questions; to drill down roadblocks and challenges; and to identify mechanisms and partners to catalyze significant positive change.

STRATEGIC VENTURE PHILANTHROPY

We have the money, the people, and the relationships to turn ideas into reality. Strategic means we are mapping challenges, blockages and drivers to identify possibilities for impact. Venture means we back our peers and peer groups; and take risks in establishing new enterprises, projects, coalitions or organizations.

ENGAGING JEWISH LEADERS TO STEP UP ON CLIMATE

There are few significant Jewish leaders today who would disagree with the need to address the climate crisis. But there are also those who do not prioritize it; are overwhelmed; or do not believe they can make a difference. We are here to understand their priorities and strategies, and offer credible, specific pathways to effect change.

WHY A JEWISH CLIMATE TRUST?


The climate crisis is too big for any one entity to fix it. And it needs every faith community and every ethnic community.
 It needs every country, every city, and every business.

For those of us who care about Israel, or are part of the Jewish people–our job is to make sure that we’re at least pulling our weight on climate. And wherever and however we can, working with others to effect wider change.

We’re here to work within the Jewish community and within Israel. But the focus of our work is universal. We’ll partner with people, communities and institutions of all faiths and none to leverage the good we aim to do.

SPOTLIGHT
Stephen Bronfman & Michael Sonnenfeldt's opinion piece in EJP
MORE
SPOTLIGHT
Stephen Bronfman on JCT and Trump's environmental cuts
MORE
SPOTLIGHT
What we're reading: Trump’s climate policies and disaster-response cuts must be a wake-up call for Jewish communities
MORE
SPOTLIGHT
JCT in The Times of Israel
Environmental reporter Sue Surkes discusses JCT's launch in light of Tu B'Shvat, the holiday of the trees
MORE
SPOTLIGHT
JCT in eJewish Philanthropy
JCT's founding co-chairs, Michael Sonnenfeldt and Stephen Bronfman, interviewed by Judah Ari Gross.
MORE
SPOTLIGHT
Israel Climate Reports in English & Hebrew
Summaries of climate reports selected by our research team
MORE
WHO WE ARE
STAKEHOLDERS
FOUNDING CO-CHAIRS
Stephen Bronfman & Michael Sonnenfeldt
The Claudine & Stephen Bronfman Family Foundation
The Goldman-Sonnenfeldt Family & Foundations
The Diane and Guilford Glazer Foundation
Charles & Lynn Schusterman Family Philanthropies
Jeff Hart & Family
Charles Bronfman
Marcia Riklis & Family
David Cogut & Family
PAI - Israeli Climate Partnership
The Sarah and Daniel Rueven Foundation
TEAM
Nigel Savage
CEO
Close
Nigel Savage
CEO

MA, Georgetown University

Founded and ran Hazon (now Adamah), which under his leadership became the largest environmental organization in the American Jewish community. Before founding Hazon, Nigel worked in London for Rothschilds and as co-head of UK Equities at Govett. He’s a popular speaker and teacher, who was twice named to the Forward 50, the annual list of the most influential Jewish people in the US. In recognition for his work, he was awarded an honorary doctorate by the Jewish Theological Seminary.

Sarah Indyk
Managing Director
Close
Sarah Indyk
Managing Director

BA, Yale University, American Studies | MPA, University of Colorado


With two decades in the education and nonprofit sectors, Sarah’s background includes significant foundation experience in the areas of grantmaking, philanthropic advising, development, collaborative giving, and organizational strategy and culture. She has created and led successful giving circles, fundraising efforts, and philanthropic education programs. As Chief Philanthropy Officer for Rose Community Foundation, she led a team responsible for the stewardship and growth of hundreds of donor-advised funds and nonprofit endowments. Sarah’s greatest professional joy and fulfillment comes from bringing people together to achieve more through collaboration than anyone can individually. She lives in Denver, Colorado with her husband and daughters.

Julian Sinclair
Director of Research
Close
Julian Sinclair
Director of Research

BA, University of Oxford (first) | MPA, Kennedy School, Harvard University


Julian Sinclair is an Oxford and Harvard-trained economist specializing in renewable energy and clean technology investments. As Vice President for Research at Energiya Global, he helped develop groundbreaking solar energy projects across Africa. Julian is an environmental thought leader: his work on climate has been profiled in The New York Times Magazine, he contributed to Israel's Comptroller General report on climate, consulted to the UNDP on the Jewish response to climate change, and was the co-lead author of the 7-year plan for the Jewish people on climate and environment produced for COP.

Joe Gamse
COO
Close
Joe Gamse
COO

BA, University of Cambridge | MA, Columbia University


Joe has a decade’s worth of experience in data, investment and analytics, and brings a unique combination of financial acumen, technical skills and project management experience. He led the innovation and strategy team at a boutique investment house in London, and worked as a Portfolio Manager at a quantitative hedge fund in Tel Aviv, where he managed assets totaling approximately $150M and developed innovative tools and automated workflows. During his graduate studies at Columbia University, he worked as a researcher at the Center on Global Energy Policy, modeling renewable energy policy incentives. Joe is also a CFA Charterholder and studied Data Science in Tel Aviv, gaining proficiency in using Python for analytics and machine learning.

Sari Rosen
Israel Projects & Research Associate
Close
Sari Rosen
Israel Projects & Research Associate

BSc, Technion-Israel Institute of Technology, Haifa | PhD, Drexel University

Sari has been one of the key leaders in building the field of environmental health in Israel. She worked for over a decade at the Environment and Health Fund, at various levels of program development and management. She holds a B.Sc. degree in Mechanical Engineering from the Technion-Israel Institute of Technology and a Ph.D. degree in Biomedical Engineering from Drexel University in the USA.

Sarah Kandel-Finn
Chief of Staff
Close
Sarah Kandel-Finn
Chief of Staff

BA Management, Hadassah College | MBA, Hebrew University & Bocconi University


Sarah has significant experience managing complex processes and projects and deep knowledge of the Israeli climate-tech industry. At the Israel Innovation Authority, she led key innovation and development initiatives on AI and data analytics. She was also a Milken Fellow in the strategy department, where she developed and published rigorous and impactful resources to understand and strengthen the climate-tech space.

Max Moinian
Communications Director
Close
Max Moinian
Communications Director

BA, Barnard College, Urban Studies | MA, MIT School of Architecture and Planning


Max Moinian is a climate action leader and urban planner who brings together sustainability, design, and technology in the built environment. As a key figure at The Moinian Group, she spearheaded energy efficiency programs and carbon mitigation strategies across major properties in New York and Los Angeles. She founded Future Earth Foundation, where she produced the Climate Talk series, featuring conversations with prominent climate leaders and activists. Max also co-hosts the Better World podcast and speaks Spanish, Farsi and Italian.

Aliza Rozen
Development Intern
Close
Aliza Rozen
Development Intern

BSc, Drexel University | MSc, Drexel University | MPA, Columbia University (in progress)

Aliza brings an extensive professional experience in corporate, nonprofit, and global sectors. She has successfully led programs in fundraising, stakeholder engagement, and strategic communications, managing large-scale initiatives across healthcare, advocacy, and sustainability. With a background in consulting, media relations, and operations, she has collaborated with global organizations, philanthropists, and industry leaders to drive awareness and impact. Her expertise includes program management, crisis communication, corporate sustainability, and cross-cultural engagement. Fluent in English and Spanish, she brings a strategic and solutions-oriented approach, fostering meaningful partnerships and delivering results in mission-driven environments worldwide.