Paul is the founder of CDP, co-founder of Transition Value Partners and a presenter on the Outrage & Optimism podcast alongside Christina Figueres and Tom Rivett-Carnac. He founded CDP in 2000 with an ambition of creating a global economic system that operates within sustainable environmental boundaries and prevents dangerous climate change.

Maia is Global Director of the GHG Protocol at WBCSD, co-leading its secretariat alongside WRI. With over 15 years’ experience, she previously directed corporate and cities reporting at CDP, helping thousands of organisations—including large global companies and municipalities—measure and disclose climate-related data.

Michael is a globally‑recognised authority on greenhouse‑gas measurement. He has shaped climate policy and systems since the mid‑1990s. A lead author on multiple IPCC reports (contributing to the 2007 Nobel Peace Prize), he’s served as a negotiator and methodology expert under the UNFCCC and Kyoto Protocol. He also advises the SBTi and ICVCM.

Tamara leads sustainability at Xero, the global accounting software firm. On a mission to shake up how business leaders think about sustainability, she helps organisations embed responsible practices – from carbon accounting to ethical supply chains – into everyday decisions. With over 25 years of international experience, Tamara cuts through the noise to turn sustainability from a nice-to-have into how business gets done.

Mike is a leading expert on carbon accounting. He is a professor at Lancaster University and founder of Small World Consulting. His books include How Bad Are Bananas? The Carbon Footprint of Everything, There Is No Planet B and A Climate of Truth, and he is a contributing author to The Climate Book created by Greta Thunberg.

Emily is the net zero policy lead for the UK’s National Standards Body, the British Standards Institution (BSI), and an Associate of Oxford Net Zero, focusing on the role of standards in accelerating the global net zero transition. Emily was a convenor of the ISO Net Zero Guidelines development process in 2022, which now forms the basis of the ISO net zero standard, the world’s first international standard on net zero emissions for organisations. Before joining BSI, Emily worked at the UK Government’s Department for Business, Energy, and Industrial Strategy (BEIS) as a Senior Policy Advisor on Net Zero Governance for the UK’s Net Zero Strategy.

Kilian Daly is Executive Director at EnergyTag, a nonprofit, where he leads global efforts to advance 24/7 clean energy markets and more accurate carbon accounting. He was lead author of the world’s first standard for hourly electricity tracking - backed by 100+ organisations including UN Energy, Google, and Microsoft - and regularly engages with governments and industry to shape next-generation clean energy policy.

Jessica is the co-founder and CEO of Sumday, a leading carbon accounting software company. With a background in accounting and sustainability, she’s on a mission to make environmental reporting as routine and rigorous as financial reporting. Jessica helps businesses build the capabilities to own their carbon data and embed it into everyday decision-making.

Hanna’s research focuses on the development of efficient and implementable decarbonization strategies and instruments. Currently, Hanna's work focuses on green electricity claims, examining pathways to more granular matching to effectively drive investments in renewable energy sources and storage solutions.

Duncan Oswald is Climate Science Lead at Sage, bringing more than 25 years’ experience in environmental consultancy. A chartered environmentalist and net-zero specialist, he helps organisations from governments to multinationals, turn climate science into practical decarbonisation strategies that deliver real-world impact.

Tim Croker is Head of Carbon Accounting at Climatiq and a former Fellow Chartered Accountant (FCA). With over 17 years’ experience in carbon accounting, he has worked across public and private sectors to build robust, science-aligned emissions tools and strategies. At Climatiq, Tim leads the science and data team, helping organisations integrate accurate, audit-ready carbon data into their decision-making and reporting systems.

Lindsay is Co‑Founder & COO of Sumday, a leading carbon accounting platform. A qualified CPA with more than a decade’s experience—from audit to sustainability strategy—he’s on a mission to equip accountants and organisations with the tools and education needed to embed carbon accounting alongside financial reporting.

Rebecca has chaired the CAA's Software Interoperability Working Group since January 2024. She is currently acting as Climate Network Lead at Lambeth Council, and was previously Climate Strategy Advisor at isla, and was a researcher on the UKRI-funded project "Carbon Measurement Tools in the Creative Industries" at the Royal College of Art in 2021.

Tom is a Senior Manager at the Carbon Trust, where he leads on footprinting software and data. With a background spanning energy, analytics, and digital transformation, he helps businesses navigate carbon accounting with clarity and rigour. Tom has led on high-impact data initiatives and contributed to major policy developments, including maritime decarbonisation frameworks.

Katri is a technical sustainability expert leading carbon accounting and net zero work at Bioregional. With a decade of experience across data, reporting, and carbon markets, she helps organisations turn complex sustainability goals into practical action. Katri chairs the Carbon Accounting Alliance’s Offsetting and Neutrality group and is a regular speaker on carbon and decarbonisation.

Dr. Green is co-founder of MyCarbon and Chair of Professionalisation and Training at the Carbon Accounting Alliance. With deep expertise in carbon quantification and net zero strategy, he’s advised FTSE 100 firms, contributed to COP26 work, and regularly speaks at UN climate events – all driven by a mission to reduce the impact of the climate crisis

Jessica is the co-founder and CEO of Sumday, a leading carbon accounting software company. With a background in accounting and sustainability, she’s on a mission to make environmental reporting as routine and rigorous as financial reporting. Jessica helps businesses build the capabilities to own their carbon data and embed it into everyday decision-making.

Philippe is Founding Footprinting Lead at carbon accounting software provider Minimum. With over a decade of experience at the Carbon Trust, he’s an expert in product carbon footprinting and has supported labelling schemes across four continents. He’s also an active contributor to several Carbon Accounting Alliance working groups.

Imogen is a Senior Consultant at the Carbon Trust, advising organisations on Net Zero strategy, science-based targets, and beyond value-chain mitigation. With expertise in carbon removals and land-sector emissions, she’s contributed to leading frameworks like SBTi FLAG and WRI guidance, helping businesses align with science-driven climate goals

Felix is a Carbon Expert at Carbon+Alt+Delete, helping sustainability consultants deliver high-quality carbon accounting. With a background in engineering, education, and climate communication, he brings a unique mix of technical rigour and public engagement to the net zero transition. Felix is also a former lecturer and active contributor to climate initiatives across Europe.

Lindsay is Co‑Founder & COO of Sumday, a leading carbon accounting platform. A qualified CPA with more than a decade’s experience—from audit to sustainability strategy—he’s on a mission to equip accountants and organisations with the tools and education needed to embed carbon accounting alongside financial reporting.

Tim Croker is Head of Carbon Accounting at Climatiq and a former Fellow Chartered Accountant (FCA). With over 17 years’ experience in carbon accounting, he has worked across public and private sectors to build robust, science-aligned emissions tools and strategies. At Climatiq, Tim leads the science and data team, helping organisations integrate accurate, audit-ready carbon data into their decision-making and reporting systems.

Renaud is VP Climate Action at SWEEP, and a recognized expert in corporate climate action with 18 years’ experience spanning carbon finance and accounting. He began his career at GERES, pioneering carbon offsetting programs, before launching the carbon neutrality practice at Carbone 4 and leading the Net Zero Initiative. At SWEEP, he helps companies turn climate ambition into measurable action, recently co-developing an index assessing corporate contributions to net zero.

Björn Bröskamp is a sustainability professional with a background in chemistry and carbon accounting. At ClimatePartner he led the emission factor database team, engaging with various market stakeholders and developing the company’s strategy. His experience to implement sustainability practices span from corporates to hyper-growth startups, always focused on creating data-driven solutions for impactful climate action. 

Tanguy is the London-based co-CEO and co-founder of Sami, a French carbon and ESG data management platform, with more than 1500 clients. Sami is the leading platform in France and recently launched in the UK. Tanguy is also a founding member of #WeAreEurope, a coalition of ESG professionals working for a fairer, more sustainable, and more democratic Europe.