Our People

The Green Cross family and our network of partners span the globe and work together to help the organization achieve its mission to protect humanity from environmental threats and poverty. Our staff, governing and honorary boards, national organizations, interns and volunteers reach thousands of people worldwide everyday. The dedicated support we receive from a wide range of partners, including civil society and corporate, make it possible for us to advocate for change and conduct our on-the-ground activities.


Pierre Muller

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Vice-President of Green Cross International, Pierre Muller was born in Geneva, Switzerland, in 1952. From 1995-2007, Pierre was a member of the City of Geneva government and Mayor. He was the Head of the Finances and Housing Department for 12 years. During the same period, Pierre also served as a board member of several public and semi-public entities.



Adam Koniuszewski


As Chief Operating Officer of Green Cross International, Adam oversees the activities and development of the organization’s international programmes and its global network as well as the daily operations of the Geneva headquarters. Adam is also the Project Leader of the Climate Change Task Force and the Board Member and Treasurer of Green Cross France & Territories, chaired by Jean-Michel Cousteau.


Paul Walker


Director of Green Cross International’s Environmental Security and Sustainability programme, Paul has helped lead the programme since its inception in the mid-1990s with colleagues from Russia and Switzerland.  He is also manager of the Washington DC office for GCI and its US national affiliate, Global Green USA.



Marie-Laure Vercambre

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Marie-Laure Vercambre has been Director of Green Cross International’s Water for Life and Peace programme since 2010. Before starting with Green Cross International, Marie-Laure worked with the organization in France as Director of Communications and Advocacy.



Maria Vitagliano

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Maria Vitagliano has worked with the Green Cross Social and Medical (SOCMED) services programme since 2002, working for six years as the programme’s deputy director before becoming its overall director in 2010. Maria, a Swiss-Italian citizen, has a strong background in education and intercultural studies and work.