CDSB Secretariat team

The Secretariat delivers CDSB's strategy and engages with stakeholders to provide decision-useful environmental information to markets.

Mardi McBrien – Managing Director

Mardi McBrien joined the Climate Disclosure Standards Board (CDSB) as Managing Director in 2011 following an eclectic career which has included roles such as President of an International Students Association, public-private partnership management, leading flagship environmental campaigns and projects including for the Campaign to Protect Rural England (and the author Bill Bryson), WWF-UK’s Earth Hour and carbon market policy for UK’s Department of Energy and Climate Change (DECC). Mardi is a member of the GRI Stakeholder Council, a trustee of the International Tree Foundation and a founding board member of WOCAN — Women Organising for Change in Agriculture and Natural Resource Management. Mardi holds a double degree in Forestry and Environmental Science from the University of Melbourne and a MSc in Agricultural Economics from SOAS, UCL. In 2013, Mardi was awarded environmental campaigner of the year by the Sheila McKechnie Foundation.

Twitter: @MardiMcB
Linkedin: Mardi McBrien

Lois Guthrie – Special Advisor (former Founding Director)

Lois has led the development CDSB’s Technical Work Program including the frameworks for reporting climate change-related and environmental information in mainstream annual reports. Lois also serves on the ACCA’s Global Forum on Sustainability and a member of Carbon Tracker’s Advisory Board. Previously, Lois was Technical Director of the Group Tax Department in Zurich Financial Services, Technical Director to the International Integrated Reporting Council (IIRC) and was part of the development of its integrated reporting framework and Technical Director where she was the author of the first CDP questionnaire.

Nadine Robinson – Technical Director

Nadine joined the Climate Disclosure Standards Board as Technical Director in 2017. Her work focuses on integrating climate and natural capital risks and opportunities into decision-making, legal and regulatory frameworks and corporate reporting. Nadine leads CDSB’s technical work programme, manages its expert technical working group and produces and delivers technical and advocacy materials.

Previously, she worked as an environmental consultant and lectured on environmental policy at Birkbeck College. As the Commonwealth Secretariat’s Climate Change Advisor and in her roles in Government and the United Nations Development Programme (UNDP), Nadine has advised on environment, climate change and sustainable development. She also worked as an asset finance solicitor. She has conceptualised and developed strategic initiatives on climate finance, biodiversity, the green economy, the sustainable development goals (SDGs), and energy-climate-poverty-linkages. Nadine holds a BA (Geography) from McGill University, and an MA (Geography) from York University (Canada).

Twitter: @NadineCDSB
LinkedIn: Nadine Robinson, MA 

Michael Zimonyi – Policy & External Affairs Director

Michael leads CDSB's policy and external affairs work. He joined CDSB in 2012 and focuses on policy and corporate engagement and oversees external affairs. Prior to joining CDSB, Michael has worked at a global pharmaceutical corporation and at the sustainability think tank Forum for the Future. Michael has a degree in Chemistry with Environmental Science from the University of Birmingham, studied Sustainable Finance at the University of Oxford and is a member of the Royal Society of Chemistry. He is also member of the EFRAG European Lab Project Task Force on Climate-Related Reporting and the UK Financial Reporting Council's Stakeholder Advisory Panel.

Twitter: @MikeZimonyi
LinkedIn: Michael Zimonyi

Gemma Clements - Project Manager

Gemma joined the CDSB Secretariat in 2016 to support CDSB's technical work. After working as an environmental educator for 4 years in London she completed an MSc in Environment and Development from the London School of Economics and Political Sciences. This role builds upon her interests in non-financial reporting, sustainability and climate change. She is currently managing the TCFD Knowledge Hub and leading on the Beyond Disclosure programme.

Twitter: @ClemGemma
LinkedIn: Gemma Clements

Lesley McKenna - Communications and Marketing Manager

Lesley joined CDSB in 2019 after almost 8 years in marketing and events roles. Lesley began her career working with in-house marketing departments and digital marketing agencies in Ireland and Spain. From there she moved into conference production producing global C-suite innovation and investment summits focussed on solving the challenges of the food, water and waste sectors. She now heads up CDSB's communications and marketing activities furthering its mission to align environmental and climate information in the mainstream report.

LinkedIn: Lesley McKenna 

David Astley - Senior Technical Officer

David joined CDSB in 2017 to support its research and technical work. He is currently focused on the Corporate Reporting Dialogue’s Better Alignment Project, working with the other key reporting organisations to create a more coherent and complementary reporting landscape. Previously he was the research and delivery lead on the collaborative Reporting Exchange project for CDSB. David holds a Masters in Earth Sciences from the University of Oxford.


Fiona Quinlan - Technical Manager

Fiona joined CDSB's technical team in 2019 having previously spent 6 years working in corporate sustainability reporting and strategy. During this time she worked at the consultancy Carbon Credentials, advising corporate clients on climate strategy and risk, as well as for the energy company Centrica. At Centrica, she managed sustainability data collection, including responding to ESG benchmarks such as CDP. Fiona has a BSc in Geography from Durham University and is a Practitioner member of the Institute of Environmental Management and Assessment (PIEMA). She is currently studying for an MSc in Carbon Management at the University of Edinburgh via distance learning. At CDSB she is focused on producing and disseminating technical content that can help to drive greater uptake of climate risk reporting

Twitter: @FLQuinlan
LinkedIn: Fiona Quinlan

Sundip Jadeja - Technical Manager

Sundip Jadeja
Sundip joined CDSB’s technical team in 2019 after spending four years representing the UK private equity and venture capital industry. At the British Private Equity and Venture Capital Association (BVCA), he led on several policy areas including responsible and impact investing; accounting, reporting and legal developments; and a governance initiative to improve transparency within the industry. Previously, Sundip trained as a chartered accountant at Deloitte in the Banking and Capital Markets group and is a member of the Institute of Chartered Accountants in England and Wales (ICAEW). He has an MA in Land Economy from Cambridge. Sundip supports the CDSB’s technical work programme to drive uptake of the TCFD recommendations and enhance reporting of climate, natural capital and environmental information globally.

Linkedin: Sundip Jadeja

Jake Atkinson – Policy Manager

Jake joined CDSB’s Policy Team in 2020 after seven years in accounting. During this time he has worked on various ESG projects, including the Natural Capital Protocol; UNSDG reporting and Social Return on Investment. Previously he was working at UK Finance, working on projects concerned with consumer and SME protection. Jake is a qualified ACCA and holds a BSc and MSc from The University of Sheffield and UCL respectively, where his research looked at environmental and social accounting. His work at the CDSB focuses on the EU Non-Financial Reporting Directive.

Twitter: @JakeAtkinson
Linkedin: Jake Atkinson

Nontokozo Khumalo – Corporate Engagement Manager

Nontokozo joined the Climate Disclosure Standards Board in 2019. She supports companies with their mainstreaming of reporting on climate-related and environmental issues. She has over 10 years of experience in the asset management, banking and insurance sectors having worked within corporate governance, institutional client relationship management and sustainability functions. Past roles include that of manager in Standard Bank Group's sustainability unit and senior consultant at ESG firm, EBS Advisory where she was responsible for engagement on sustainability topics with private equity companies.Nontokozo holds a Master of Commerce degree in Development Finance from the University of Cape Town and a Bachelor of Commerce degree from the University of the Witwatersrand and has completed the academic qualification required for financial advisors under the Financial Planning Institute of Southern Africa.

Linkedin: Nontokozo Khumalo