Our Trustees
Our board of Trustees work together to set Tree Aid's strategic direction. They ensure we are true to our mission and values and check our progress against our strategy.
Elizabeth Davis, Chair
Elizabeth is an experienced senior leader in the public sector, with a particular interest in good governance, workforce and organisational design. As an HR practitioner, she has had roles in international development with both the UK government’s Department for International Development and the United Nations. Elizabeth was part of the senior team in Wales that brought together the Forestry Commission, Environment Agency and Countryside Council. In 2015, she was awarded an OBE for her contribution to public services in Wales.
Hilary Allison
Hilary’s experience is in advocacy for forests and for nature both in the UK and internationally. As Director of Policy for the Woodland Trust she established the trust’s approach to campaigning and lobbying for UK woodland from 1998 onwards. More recently she worked for UNEP-WCMC as Head of Ecosystem Assessment and Policy Support, focusing on the power of data, information, evidence, and knowledge to underpin better biodiversity-related decision-making. She now works part time as a government-appointed Forestry Commissioner for England and for UNEP’s Global Assessment Unit. She became a Tree Aid Trustee in 2021.
Katie Bowyer
Katie is an experienced senior leader in the not-for-profit sector, most recently Director of Fundraising and Marketing Strategy at the British Red Cross where she was responsible for developing an ambitious transformation programme for fundraising and supporter engagement. In the past she has held senior fundraising roles at Diabetes UK and Great Ormond Street Hospital Charity and has worked in a range of other UK charities including NSPCC and Bliss. She is a member of the advisory panel for Missing People and a trustee for The Conservation Volunteers. She has been a trustee at Tree Aid since 2024.
Roger Davies
Roger’s career has been predominantly working in the charitable sector, as Chief Executive and prior to that as Finance Director. For the ten years to 2014, he was Chief Executive of MHA, one of the UK’s largest charities and foremost providers in the sectors of care and housing for older people.
For the past ten years, he has been working for several organisations on a NED basis. Current positions include Chair of Rangeford Villages, a developer and operator of retirement villages, part of the Octopus Group, and a consultant to LMS Capital, an investment company listed on the London Stock Exchange.
Defrim Dedej
Defrim is a Grants and Innovate Finance specialist who has previously headed the global grants and innovative finance practice area at Chemonics UKD, and other consultancy firms. He has designed and managed more than 100 grants and innovative finance programmes on behalf of FCDO, USAID, DFAT, EU, Trust/Foundations and Development Financial Institutions (DFIs).
He is a strong advocate of private sector development involvement in achieving SDGs and in particular tackling climate change, having championed the use of grants and other innovative finance instruments to offset risk and bring other investors and donors to the fore.
Tristram Hilborn
Tristram is a Chartered Forester and is an environmentalist with more than 20 years’ experience in the land management sector. Tristram is the Chief Operating Officer for Forestry England, the largest landowner in England, with responsibility for the organisations operations. Tristram is also a Non-Executive Director for the Broads National Park. Tristram has an Masters of Business Administration from Bayes Business school and is committed to sustainable land management to deliver social, environmental and economic benefits. Tristram has served as a Trustee for Tree Aid since 2021.
Anwar Mamon
Anwar is an award-winning Executive Producer with over 21 years’ experience in TV production. Spending a decade with the BBC, and currently with Wildstar Films, he specialises in natural history and adventure documentaries for UK, US and international broadcasters. Anwar believes in bringing diverse voices into production, both on-screen and off-screen, to attract new audiences to the natural history genre. He has been a Tree Aid Trustee since 2024.
Henry McLoughlin
Henry is a deep technology investor with a passion for climate policy and activism.
Over a decade as a climate investor, Henry has worked with some of the world’s most iconic clean technology companies and helped raise 2 billion dollars for climate solutions. He has led a number of transformative climate campaigns to establish Electric Vehicle mandates and incentives and to shut down coal plants.
Henry’s passion for the environment is rooted in his childhood summers spent in the French countryside and in the woodlands of Maine. Henry holds degrees in history and business administration and is a veteran of the war in Afghanistan.
Sabrina M. Segal
Sabrina is a licensed attorney and a third-sector risk and compliance specialist with over 20 years of experience supporting small, medium, and large international NGOs, NGOs, and local and national NGOs to develop, manage, and monitor their risk and compliance operating environments. She has worked for public, private, and third-sector organisations worldwide and has experience managing and implementing humanitarian and development projects funded by institutional, private, and blended funders. Sabrina is thrilled to bring her skills to the Tree Aid board and help support the achievement of the organisation's goals. Sabrina became a Tree Aid trustee in 2024.
Alex Simuyandi
Alex has experience leading the operations of organisations in inclusive finance. He was Head of Operations at The Private Infrastructure Development Group, an infrastructure development and finance organisation that delivers pioneering infrastructure in the poorest and most fragile countries. Prior to that he was Group Operations Director at AgDevCo, an impact investor that focusses on inclusive African agriculture. He has worked for the UN, advancing inclusive agri-SME and smallholder finance, as well as in the private sector with global agricultural value chains. He is passionate about protecting and enhancing livelihoods whilst mitigating the effects of climate change. He became a Tree Aid Trustee in 2021.
Kate Wharton
Kate is passionate about building solutions for climate, nature, and human rights, particularly in regions affected by conflict and fragility. She founded and leads CrossBoundary’s Natural Capital practice, focusing on unlocking private finance for climate and conservation in emerging and frontier markets. She advises nature-based carbon projects globally and leads The Fund for Nature. Prior to CrossBoundary, she was based in Istanbul as Chief Operating Officer at Hala Systems, a humanitarian technology company focused on civilian protection in Syria. Kate holds an MBA from Stanford and a B.S. in Economics and International Affairs from Georgia Tech. She is based in Dakar, Senegal and became a Tree Aid Trustee in 2024.
