About us

Headquartered in Geneva, Switzerland, we benefit from a unique concentration of International Organizations, Financial institutions, NGOs and Academia that we can work with to further our mission.

International Environment House 2

Chemin de Balexert, 7-9
1219 Vernier, Geneva, Switzerland

Phone: +41 22 755 65 45

Fax: +41 22 755 65 49

Email: secretariat@regions20.org


David Albertani

Executive Director

Christophe Nuttall

Senior Advisor

Jiao Tang

Chief Operating Officer

Shayma Shaban

Operations Manager

Cecilia Serin

Communication & Marketing Manager

Antonio Zanchiello


Ole Ohlhoff

Grant manager

Tyler Creese

ES and Impact Specialist


Mr. Arnold Schwarzenegger

Emeritus Founding Chair


Mr. Melchior de Muralt 

Chairman of the R20 Foundation. Managing Partner at de Pury Pictet Turrettini & Co (Switzerland)


President of 7th Generation Advisors (USA)

Dr. Barbara Buchner 

Global Managing Director of Climate Policy Initiative (USA)

Dr. Frannie LEAUTIER

Founder and Managing  partner of Ezembat Group (Africa).



President of 7th Generation Advisors (USA)

Mr. Magnus Berntsson

President, President, Assembly of European Regions, President Region Västra Götaland (Sweden)

Honorary Presidents

Ms. Michèle Sabban

Honorary President (President 2013-2017), Director of R20 Paris

Ms. Linda Adams 

Honorary President (Founding President 2011-2013), Former Secretary, California Environmental Protection Agency

The R20 Foundation is the entity responsible for almost all aspects of funding of the R20 Association and its operations. Its objective is to drive the financial vision and the implementation of bankable portfolios of low carbon and climate resilient sub-national infrastructure projects. The R20 Foundation was created at the request of a number of investors interested to invest in the R20 ecosystem of blended finance. With a Board of Directors composed of green finance leaders, the R20 Foundation meets the demands of development banks, sovereign funds, private bans, private equities, family offices and pension funds.

The R20 Association is legally structured as a Swiss association. On behalf of the General Assembly of Members, the Governing Board carries out all acts that further the purpose of the organization and is responsible for managing the organization’s business.

R20 local partners

To facilitate and bring together local authorities, technology providers and investors, we work closely with our local focal points.

Terry Tamminen R20 USA Director

Michèle Sabban 

Natasha Ilic Secretary-General of the office of Michèle Sabban

Ruben Guerra

Jorge Pinheiro Machado

R20 Legacy

During his tenure as Governor of the State of California from 2003 to 2011, Arnold Schwarzenegger was responsible for signing into law ground-breaking legislation that translated the Kyoto Protocol into Californian law. This and other initiatives are what led President Obama to ask Governor Schwarzenegger to obtain similar commitments from thirty other US States. A. Schwarzenegger’s success in implementing action at the sub-national level, and his ability to demonstrate the potential to scale this impact by replication at the sub-national level is ultimately what gave birth to the R20 Regions of Climate Action. In December 2009, after evaluating the failure of the COP15 to agree on the practical means to limit carbon emissions, Gov. Schwarzenegger, with the support from the UN Secretary General Ban Ki Moon, decided to create a new coalition of Regions committed to action. He met with a number of heads of regions, including Governor Uduaghan from Delta State, Nigeria, President Charet from the Province of Quebec, Canada, President Huchon and Vice President Michèle Sabban from Region Ile de France, and 17 other representatives from other Regions, who all decided to create R20 Regions of Climate Action. In September 2010, Governor Schwarzenegger organized the Third Global Governors Climate Summit in Sacramento and launched the R20 Charter, which was signed by representatives of Regions, national governments, NGOs, foundations, private companies and finance institutions. In September 2011, the First constitutive General Assembly of R20 marked the official creation of the NGO. Linda Adam, The California Environmental Protection Agency State Secretary, was officially elected President of the R20 Board and Terry Tamminen was nominated as R20 Special Advisor to Governor Schwarzenegger, the Honorary Founding Chair of R20. In January 2012, Dr. Christophe Nuttall, Director of the UNDP Hub for Innovative Partnership, officially joined R20 as Executive Director. From 2013 to 2017, Michèle Sabban took on the R20 presidency. In June 2017, Magnus Berntsson, President of the Regional Council of Västra Götaland and President of AER, was elected as the new R20 president.

Initially, through collaboration with and support from the Leonardo DiCaprio Foundation and our partners, we have created a technical and financial ecosystem (R20 Value Chain), which facilitates the identification, structuring, development, and financing of sub-national green infrastructure projects.

Through that strategy, we supported programmes in Oran, Algeria, Brazil and Nigeria. We also developed: a solar bakery in Kisarawe District, Tanzania, a 50MV Solar photovoltaic power plant project in Kita Mali, a waste management project in Dapeng New District China and green cities-green regions project in Romania. The lessons learned from those projects have been shared with the Schwarzenegger’s Institute.