About us

Greening finance and financing green

Established in 2019, the Green Finance Institute is an independent, commercially focused organisation, supported by seed funding from HM Treasury, the Department for Business, Energy and Industrial Strategy and the City of London Corporation.

As the UK’s principal forum for public and private sector collaboration in green finance, we are uniquely placed to mobilise capital to accelerate the domestic and international transition to a sustainable, net-zero carbon economy that is also climate resilient.

We convene and lead mission-led coalitions, made up of networks of dynamic decision makers, to identify and unlock barriers to deploy capital at pace and scale towards impactful, real-economy outcomes.

Our Team

Sir Roger Gifford

Chair, Green Finance Institute
Senior Banker, SEB
Former Lord Mayor, City of London

Dr. Rhian-Mari Thomas OBE

Chief Executive, Green Finance Institute

Emma Harvey

Director, Green Finance Institute

Sir Roger Gifford is the Chairman of the Green Finance Institute, a Senior Banker at Skandinaviska Enskilda Banken (SEB) and was 685th Lord Mayor of the City of London.

He began his career in the financial sector at S.G. Warburg & Co, before joining SEB in 1982. Prior to his appointment as UK Country Head (2000 – 2016) Roger headed the bank’s operations in Japan for six years. He has worked in and around the primary debt and equity capital markets most of his career.

Roger is Vice Chairman and past Chair of the Association of Foreign Banks (AFB) in London and Chair of the Advisory Board of the International Business and Diplomatic Exchange (IBDE). He was Chair of the London Green Finance Initiative launched in 2016 to further the contribution of the financial sector to the G20 climate agenda, and chaired the UK Government’s Green Finance Taskforce in 2018.

Sir Roger read Chemistry at Trinity College, Oxford.


Dr. Rhian-Mari Thomas was awarded an OBE for services to green banking and was appointed Chief Executive of the UK Government and City of London Corporation-backed Green Finance Institute in 2019.

She began her banking career at Barclays Investment Bank in 2000, and spent 10 years in Leveraged Finance and Financial Sponsors coverage before holding a succession of leadership roles across Barclays Corporate Bank and Barclaycard. Most recently, she was Global Head of Green Banking and founder and chair of Barclays Green Banking Council, which developed and launched Barclays’ suite of green finance products and services.

Rhian represented Barclays on the FSB’s Taskforce on Climate-Related Financial Disclosures (TCFD), the UK Government Green Finance Taskforce, and the Banking Environment Initiative’s Fintech Taskforce.

She was also a member of the Global Advisory Council for Oxford University’s Sustainable Finance Programme and sat on the steering group for the United Nations Environment Programme – Financial Institutions initiative.

Rhian holds a PhD in Physics from Trinity College, Dublin, Ireland.


An experienced and passionate green finance specialist, Emma is responsible for directing the Coalition for the Energy Efficiency of Buildings at the Green Finance Institute. Prior to joining the Institute, Emma worked across several areas of Barclays Bank including product development and corporate debt structuring. Throughout this period she championed the green finance agenda, supporting the bank’s first Green Bond issuance and launching the Barclays Green Home Mortgage.