Top 10 Sustainability & Environment Speakers for your 2025 event

We know that the environment needs our attention, and we know that sustainability is a key word in the targets of many businesses and policies. But what does it really mean?

Often the best way to learn more about a topic is to listen to a captivating speaker  tell a story.

In light of the huge environmental challenges the world is facing, we have rounded up 8 amazing speakers who interact with the theme of sustainability.

Their stories work to transform environmental apathy, and while no two speakers are the same, their prevalence only enhances how widespread sustainability is as an issue.

Alok Sharma

Sir Alok Sharma, former COP26 President and UK Cabinet Minister, led the historic Glasgow Climate Pact uniting nearly 200 nations on climate action. Knighted in 2023, he continues to champion green finance, clean energy and sustainable development worldwide.

Lewis Pugh

Lewis Pugh, endurance swimmer, maritime lawyer and UN Patron of the Oceans, is the first person to complete long-distance swims in every ocean, including the North Pole and the Hudson River. He has helped protect over 3.5 million km² of ocean through his pioneering “Speedo diplomacy.”

Ellen MacArthur

Dame Ellen MacArthur, record-breaking solo sailor, is a global leader in resilience and sustainability. Founder of the Ellen MacArthur Cancer Trust and the Ellen MacArthur Foundation, she inspires audiences with her extraordinary journey from ocean feats to championing the circular economy and positive change.

Chris Hines

Chris Hines MBE, co-founder of Surfers Against Sewage and former Sustainability Director at the Eden Project, has spent over 30 years driving environmental change. A leading advocate for sustainable business and the circular economy, he advises globally on strategy, leadership and positive impact.

Jessica Sansom

Jessica Sansom, Chief Impact Officer at EIT Food, is a sustainability leader with over 20 years’ experience transforming the food and drink industry. Formerly with Huel, Innocent Drinks and McDonald’s, she is a recognised thought leader on sustainable leadership, innovation and the future of food.

Michael Pawlyn

Michael Pawlyn, architect and pioneer of regenerative design, is renowned for his work on biomimicry and sustainable innovation. Founder of Exploration Architecture and central to the Eden Project team, he co-initiated the Sahara Forest Project, launched Architects Declare, and is a leading keynote speaker on regenerative futures.

Jose Maria Figueres Olsen

José María Figueres, former President of Costa Rica, is a global leader in sustainability and climate action. Co-founder of the Carbon War Room and former CEO of the World Economic Forum, he bridges politics, business and technology to inspire action on climate change, globalisation and sustainable development.

Katharine Wilkinson

Dr Katharine Wilkinson is a leading climate strategist, bestselling author and co-founder of the All We Can Save Project, known for her bold vision of a regenerative future. Senior writer of Drawdown and co-editor of All We Can Save, she equips leaders with proven solutions and inspires urgent, courageous action on the climate crisis.

Tessa Clarke

Tessa Clarke is the Co-Founder & CEO of OLIO, the world’s only neighbour-to-neighbour food sharing app, with over 2.5 million users worldwide. In her talks she shares what it's like to launch a start-up business while looking after a young family, what a 'remote-first' business looks like, how to create a truly inclusive culture in the workplace.

Nigel Topping

Nigel Topping is the UN’s former High-Level Climate Action Champion, driving global collaboration between business, finance, cities and governments to accelerate climate action. Previously CEO of We Mean Business and Executive Director at CDP, he brings deep expertise in leading the transition to a zero-carbon economy.

Above are just a handful of our inspiring sustainability and environment speakers. You can discover even more HERE.
From climate strategists and policy leaders to innovators driving change, our experts bring fresh perspectives and practical insight into one of the most pressing challenges of our time. Whether you’re looking to explore the future of clean energy, the circular economy, or global climate action, these speakers will equip your audience with the clarity, inspiration and solutions needed to create a more sustainable future.

At Speakers Corner, we’re dedicated to finding the perfect speaker for your event. Our friendly team of experts are more than happy to share their knowledge with you, to ensure that your event reaches its full potential.

Give us a call today on +44 (0)20 7607 7070 or email info@speakerscorner.co.uk.