top of page


A Secretariat composed of academic experts and professional diplomats supports the Commission. The Secretariat is hosted by the Paris Peace Forum, an international civil society organisation committed to improve global governance. 

Head of the Secretariat

Head of the Secretariat

Khalid Tinasti, PhD

Khalid Tinasti is also a research associate at the CCDP at the Geneva Graduate Institute, a Visiting Fellow at the International Center on Drug Policy Studies at Shanghai University, and taught international drug policy as a Visiting Lecturer at the Geneva Graduate Institute (2021-2022). He is the former Director of the Global Commission on Drug Policy, and worked as an independent consultant for IOs and as a Press and Communications Officer in the office of the Minister of Urban Cohesion (ministre de la Ville) in France.

Photo ZK PPF_edited.jpg

Policy Officer

Zarah Kandjee, M.Sc,M.A., Lic.PS

Zarah Kandjee graduated in a double master’s program in European and International Studies at the Institute of European Studies of the University of Paris VIII, as well as in Diplomacy and Strategic Negotiations at the University of Paris-Saclay. Furthermore, she wrote her master thesis on the subject of "the restitution of cultural property”. She has a passion for international relations and geopolitics.

Principal and Special Advisor to the co-chair

Principal and Special Advisor to the co-chair

Adrien Abécassis

Adrien Abécassis is a career diplomat, a former senior advisor to the French President, and currently the Chief Policy Officer of the Paris Peace Forum where he leads the team dedicated to incubating and running wide-ranging initiatives strengthening the governance of global commons. He has worked for 15 years in international policy, science and technology policy, and global governance. He was an Emmett Fellow in Environmental Law and Policy at UCLA and an International Affairs Fellow at Harvard University.

Research Director

Research Director

Joshua Horton, PhD

Dr. Horton is the senior program fellow for solar geoengineering at the Mossavar-Rahmani Center for Business and Government at the John F. Kennedy School of Government, Harvard University. He conducts research on solar geoengineering policy and other aspects of global climate governance. He previously worked as a clean energy consultant for a global energy consulting firm. Dr. Horton holds a PhD in political science from Johns Hopkins University and was a postdoctoral research fellow at Harvard Kennedy School’s Belfer Center.

Operations Manager

Operations Manager

Sophia Luisa La Marca, M.Sc, LL.M

Sophia La Marca is a young professional with experience in project management. She worked among other things for Operndorf Afrika, a project  by Christoph Schlingensief supporting cultural exchange between Africa and Europe. With a specialization in security studies, she holds a Master of Laws from Vrije Universiteit Amsterdam, and a Master of Science from Universidad Pompeu Fabra in Barcelona. She was invited to the Europeaum Spring School at University of Oxford as part of her research on EU mediation efforts.


The Climate Overshoot Commission is supported by:

Open Philanthropy 

Cohler Charitable Fund

LAD Climate Fund

300 PPM

The Ginkgo Fund

The Astera Institute

Bill & Melinda Gates Foundation

The Rockefeller Foundation supported the Commission's first meeting and hosted the Report launch.

bottom of page