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.

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.

Xander de Bruine
Knowledge Exchange Manager
+31 (0)6 5152 2405

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 has extensive experience working in communications, specialising in environmental and sustainability issues. She leads our public communications and helps us convey the value of our work internationally.

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. Ashok K. Chapagain


Ashok was our Science Director until July 2017 when he became Senior Professor at the University of Free State, South Africa. He continues to collaborate with us and leads our Water Footprint Research Alliance. You can also reach Ashok via twitter: @A_Chapagain and LinkedIn: linkedin.com/in/ashokchapagain/.

Ruth Mathews

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.

Daniel Chico Zamanillo


Daniel worked as a Project Officer with us until July 2017. He continues to work closely with us as he carries out Water Footprint work across Latin America.

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

Maite is a researcher at the University of Madrid and a consultant for UNEP.