Our People


Ann Pfeiffer

Ann joined Stakeholder Forum in 2013, and since then has ensured the effective functioning of the organisation’s financial and administrative systems, and oversees our project contracts.

Prior to joining Stakeholder Forum, Ann carried out similar roles at the Consortium on Opportunities for Volunteering, the Anglo-German Foundation, the TUC, and most recently at Advocates for International Development. She has also acted as a consultant for several small charities and not-for profit organisations and currently acts in a voluntary capacity for the Green House Think Tank.

She has an MA in Modern Languages from Oxford University, a PGCE from Reading University, and a Certificate in Accounting and a Diploma in Economics from The Open University.


Zondervan cropped BW compressedRuben Zondervan

Ruben joined Stakeholder Forum in 2017 as Executive Director. He also serves as the Executive Director of the Earth System Governance Project. In this dual role he is well-positioned to manage Stakeholder Forum and to streamline the Partnership for Governance of Sustainable Development which will strengthen the evidence base of the multi-stakeholder processes facilitated by Stakeholder Forum, and the impact of the novel policy solutions that are developed by researchers from the Earth System Governance Project. 

Ruben studied political science, modern history, law, and economics in Freiburg im Breisgau and political sciences in Potsdam, and holds a degree in environment & resource management from the VU University Amsterdam. Prior to his current position, he gained work experience in diplomacy, industry consulting, research, and international research management.

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