Our team

The team at the Water Footprint Network includes staff, Supervisory Council members and Associates.


Our team of trained specialists is ready to guide you on your journey to fair and smart water use.

Dr. Christopher Briggs
Executive Director
+31 (0) 85 484 9607

Christopher is a sustainable development professional with over 25 years of experience in ecosystem management, climate change and livelihoods. Over the last ten years, he has acted as Secretary General of the Ramsar Convention on Wetlands, worked as Environmental Practice Leader for Latin America and the Caribbean for United Nations Development Programme and as Head of Operations and Policy for the Global Environment Facility.

Ruth Mathews
Chief Policy Advisor
+31 (0) 85 484 9606

Ruth works with companies and governments to help them understand their water dependence, assess the sustainability of their water use and prioritise strategic actions in their operations and supply chain. She has been involved in numerous multi-stakeholder river basin dialogues, providing leadership in finding solutions from the technical to broad policy.

Dr. Ashok K. Chapagain
Science Director
+31 (0) 85 484 9601

Ashok provides advice to our partners, maintains scientific rigor in applying the Water Footprint Assessment and leads our research and training programme. He helps multinationals understand global water risks and supports their efforts to address the environmental impact of their water footprint by developing the case for them to support a stronger public policy for water management.

Dr. Guoping Zhang
Programme Director
+31 (0) 85 484 9607

Guoping is responsible for the development and implementation of our work programmes. He has led a number of pioneering Water Footprint Assessments and studies to support sustainable water management strategies and policies for industries and governments.

Dr. Ertug Ercin
Project Manager
+31 (0) 85 484 9604

Ertu─č manages our project staff, establishes partnerships with different stakeholders and also develops and implements innovative project ideas for us. He has led many of our Water Footprint Assessment projects, such as Bangladesh Water PACT, C&A Water Strategy and Yasar Group Water Risk Assessment.

Alexandra Freitas
Project Manager
+31 (0) 85 484 9605

Alexandra establishes partnerships and also develops and implements innovative project ideas for us. She leads our proposals as well as some of our Water Footprint Assessment projects, such as some studies for the C&A Water Strategy.

Daniel Chico Zamanillo
Project Officer
+31 (0) 85 484 9602

Daniel conducts Water Footprint Assessment projects at product, river basin and national level. He has conducted research on water management, the relation between trade and environmental policies and agriculture productivity.

Xander de Bruine
Knowledge Exchange Manager
+31 (0) 85 484 9603

Xander initiates projects for new knowledge exchange across different platforms (exhibitions, conferences, seminars, dialogues sessions, publications and virtual communication) and the engagement of networks, stakeholders and professionals from different fields.

Matilda Bradshaw
Communications Specialist
+44 (0)749 398 1940

Matilda leads our public communications and helps us convey the value of our work internationally. She is the first point of contact for media.

Elisabeth Rientjes
Management Assistant
+31 (0) 85 484 9600

Elisabeth is responsible for our general management support, including among other things financial management, bookkeeping, invoicing and administration. She is also the first port of call for people contacting Water Footprint Network.

Supervisory Council

The Supervisory Council ensures the financial and legal status of the Water Footprint Network and provides strategic guidance and direction.

Prof. dr.ir. Arjen Y. Hoekstra

Arjen Hoekstra is Professor in Water Management at the University of Twente. He is creator of the water footprint concept (2002) and initiator and co-founder of the Water Footprint Network in 2008. He was Scientific Director of the Water Footprint Network until 31 Dec 2012, after which he moved to the Supervisory Council.

Wim Bastiaanssen

Wim G.M. Bastiaanssen is a professor of global water accounting for UNESCO-IHE and professor of civil engineering and geosciences at Delft University of Technology in the Netherlands. An expert in earth observation technologies for soil, land surface and atmospheric processes, he specialises in river basin management and agricultural water management. He has extensive experience in irrigation systems hydrology at field and regional scales.

William Sarni

Will is a well-respected thought leader in water stewardship and sustainability strategies. Founder and Principal of Water Foundry, LLC, he has been providing consulting services to private and public-sector enterprises for more than three decades. As an international expert on water strategy, he and has authored numerous articles and books on the value of water, water technology innovation, agriculture, the Internet of Things and the energy, water and food nexus.


Our associates have worked closely with us, as former employees or researchers, and continue our work in their new positions.

Dr. Maite M. Aldaya
Based in Spain
+34 (0)61 672 1088