Our team

People are the heart of everything Paul does, always seeking solutions that enhance their experiences and well-being. With over 15 years dedicated to international nonprofits, he brings a wealth of knowledge in systems and processes to drive impactful change and growth.

At Climate Catalyst, he manages the team’s culture and experience, ensuring a dynamic and supportive environment.

Outside of work, Paul finds joy and inspiration in the serene beauty of his surroundings and cherishes the love of his two daughters, Jessica and Roselyn.

With a keen passion for building people-centric and people-driven organisations, Ila has previously led on creating strong culture initiatives, diverse talent pools, accessible learning & development platforms, sustainable organisational growth and grounded business operations systems.

In her role as Head of People + Operations at Climate Catalyst, Ila works to build a people-first organisation with practices that drive both collective and individual growth, and leads on designing and implementing operational systems, processes and infrastructure.

When not working, she is busy being tutored by her human & furry babies alike.

Over the last decade, Nandan has worked in varied roles across impact investing, consulting, non-profits, academia and politics, with organisations like India Climate Collaborative, Omidyar Network India, Purpose, FTI Consulting, Alexander von Humboldt Stiftung etc.

At Climate Catalyst, he is supporting the build and implementation of policy and government engagement strategies for the India Green Steel Network.

Outside of work, Nandan regularly plays sport, runs a fitness support group for close friends and family and hosts a video podcast focused on deconstructing interesting career moves of early stage professionals.

Kate Holzman has spent the last decade building high-impact partnerships and programs across a wide range of social and environmental justice areas.

At Climate Catalyst she leads regranting to our partners, and handles finance and special projects.

When not at her desk, she enjoys crafting and exploring Brooklyn with her dog.

Passionate about the role communications plays in driving positive change, Tierney has spent the last decade supporting communications and content creation for environmental non-profits.

Tierney is particularly passionate about using communications to bring new voices and audiences into the climate debate, and spends her days plotting new ways to support the Climate Catalyst team and our partners to deliver creative outputs that reach new audiences across multiple channels, including traditional media, digital and publications.

When not working, she can usually be found running, hiking, or throwing a ball on the beach with her dog, Maisy.

Passionate about the role of non-governmental actors in achieving a just energy transition, Aditya has spent the last decade working with grassroots and international nonprofits to drive evidence-based decision-making through research and advocacy.

As the India Steel Coordinator at Climate Catalyst, Aditya supports the team in managing the India Green Steel Network and collaborating with partners to catalyse steel decarbonisation in India.

Outside work, Aditya likes engaging in debates, feeding stray dogs, playing badminton, and being in the mountains.

Arief has long worked in campaigning for social and environmental change. He co-founded and was country director of Change.org Indonesia, and helped build other organisations committed to a social mission.

Arief leads Climate Catalyst’s efforts in building networks and partnerships that create collective action for the climate.

He is also an avid boardgamer and the undefeated champion in the Climate Catalyst Catan League.

Stephen has played leadership roles as a campaigner and advocate at international and national levels on climate change, international development, and other issues.

He was Chief Executive of Refugee Action from 2015-21, and previously Deputy Campaign Director of Oxfam International and a political adviser on climate change. As Chief Executive he is responsible for overall organisational strategy and impact, reporting to the board of trustees, a role he feels very privileged to have.

Stephen loves cycling, running, swimming and Crystal Palace football club.

Sabrina is a policy and public affairs professional, with experience in transport, food systems and agriculture sectors across the UK and international settings, with a particular interest in advocating for sustainable practices.

In her current role, Sabrina works to engage businesses and industry associations to scale action and influence national policy.

When not working, you’ll probably find her exploring the newest art exhibits in London, where she lives.

Aleks was awarded a Princeton University High Meadows Fellowship with the Environmental Defense Fund, which is where she helped to launch Climate Catalyst as the new organisation’s first employee.

Today she serves as Programme Manager for Climate Catalyst’s aviation programme, a role in which she develops systems that allow a team spanning five continents to collaborate effectively.

Lately Aleks has been dabbling in wok cooking, which alternately results in a tasty meal or the smoke alarm going off.

Cathy has worked across many sectors on admin, business management, people and operations and executive assistance.

As Executive and Operations Manager, Cathy provides vital administrative support to the CEO and Climate Catalyst to ensure smooth and efficient operations.

When she isn’t working you can find Cathy reading at home cuddled up with her 2 dogs, 4 cats and family, having fun at a concert or hanging upside down at aerial silks.

Committed to fostering collective action and solutions to regenerate our climate and environment, Madeleine has been working in the not-for-profit sector for over 5 years, particularly on program management and engagement with the private sector, civil society and grassroots organisations.

Supporting Climate Catalyst’s business and investor activation work, Madeleine designs and executes strategies, enables partnerships and increases the investor community’s engagement on our specific focus areas.

Outside of work, you’ll normally find Maddie outdoors on a trail run or long hike in the mountains, and exploring something new in the community.

Ferth’s career spans research, project management, policy advocacy, campaigning, and partnership building across diverse sustainability issues, including renewable energy transition, zero waste solutions, youth and stakeholder engagement, social media-powered disaster risk reduction, and sustainable urban mobility.

As Network Coordinator at Climate Catalyst, he focuses on supporting the organisation’s programmes and partnerships aimed at accelerating steel decarbonisation in Asia.

Beyond work, he finds joy in watching animated series, hiking, travelling, and listening to show-tunes.

Emma has several years of experience working on energy and climate issues for governmental research and policy organisations.

Committed to confronting the climate crisis with strong evidence and robust legislative action, she brings a wealth of technical knowledge on energy and environmental matters alongside expertise on how to implement research and policy strategies to achieve climate impact.

Emma is also the lead of our Aviation Programme, heading up our multidisciplinary team working to put the sector onto a net zero pathway.

When Emma is not leading our aviation work or our policy and research activities, she is gardening or walking her dog in the countryside.

Driven by social impact, Sakshi has spent more than a decade working on policy advocacy and strategy development for nonprofits.

Sakshi now heads the steel programme at Climate Catalyst and works with our partners to implement strategies to accelerate steel decarbonisation in India and Asia.

When not working, she is busy travelling around the world and trying new things to eat.

Carina has spent the last 15 years building teams from the ground up across a variety of sectors, ranging from grassroots organising to client services to product management.

With a focus on both high-performing and high-happiness teams, she leads operations at Climate Catalyst and designs systems and structures on everything from people operations to financial management.

Outside of work, you will usually find her at the beach, on a hike, or enjoying a good meal with good people.

Alex has spent over a decade working in development teams for non-profits, working with trusts and foundations as well as individuals across a range of issues.

Working within the fundraising team, Alex leads all reporting to current funders, as well as working to find and connect with new sources of funding for Climate Catalyst. Additionally, Alex supports the governance functions with our Board and Strategic Council.

Outside of work, she enjoys living in London as well as planning her next trip to a coastline for a cold sea swim or a hike.

Emily has spent most of her career working with businesses, investors, trade unions, and non-governmental organisations on tackling the climate emergency, most recently at The B Team before joining Climate Catalyst.

Here, she heads up our Business & Investor Engagement Department and provides a leadership role across our campaigns and networks.

Outside of work, she is a local politician in London, representing the people of London Bridge and West Bermondsey for the Labour Party.

Harsheen is a digital marketer with several years of experience building and managing large scale digital campaigns in the B2B and B2C environments.

Here at Climate Catalyst he seeks to leverage these skills and experience to shape our digital efforts and help drive our impact across the various programmes and regions we operate in.

Harsheen is filled with endless curiosity, loves being outdoors, meeting new people and engages in several sports.

Focused on putting sustainable development into practice, Ali’s career has centred on delivering learning initiatives that contribute to a better future. Ali has designed and delivered transformative learning programs for diverse audiences around the world. Ali came to Climate Catalyst after time with both the Thailand and Peru offices of EarthRights International where she worked to grow the scale and impact of training programs for environmental and human rights defenders.

In her current role as Head of Network Learning and Innovation, Ali is responsible for designing and implementing Climate Catalyst’s learning and innovation strategy, tailored to each of our campaigns.

Ali is currently based in Canada. She can usually be found outside hiking or biking on nearby trails, trying to (re)learn a language or sport, or curled up with a good book.

A driven and determined fundraising leader, passionate about environmental philanthropy, Kat has spent 18 years taking collective ambition and entrepreneurial attitude and translating this into funding for scalable programmes, influence and organisational infrastructure to maximise impact for the ocean.

Leading the fundraising team, Kat serves the Climate Catalyst team by building strong relationships that deliver finance for high impact campaigns and partnerships.

When not bringing her curiosity to the climate challenge, she can be found building something out of lego with her kids or with her nose in a good book.

Passionate about the role philanthropy has in solving the climate and biodiversity crises, Gemma has spent the last twelve years in senior development roles for environmental, conservation and international development nonprofits across Europe, the Middle East and the UK.

As Head of Fundraising, Gemma builds powerful partnerships with climate focussed philanthropists and donors.

When not working, she can usually be found on the beach!

As a believer in the power of collaboration, Saskia has spent the last twelve years working to build networks and communities of practice in research, civil society and international development.

As the Head of Networks and Partnerships for Climate Catalyst, Saskia focuses on areas where there is a clear need and opportunity for collaboration in the climate community and uses the consult, convene and campaign model to drive change.

When not working, she is usually found somewhere in the forest or a playground with her family, doing yoga or curled up with a book.

Naomi is a strategist, lawyer, and campaigner who has worked for more than a decade across climate, environmental justice, and corporate responsibility, with the belief that systemic problems require systemic solutions.

As the Director of Programme Strategy, she leads the delivery of impactful, collaborative strategies that scale action on complex climate issues.

She currently lives in Oslo, and when she isn’t trying to master Norwegian or cross country skiing, she can be found hiking or dismantling the patriarchy.