Gertjan Medema elected as International Member of the U.S. National Academy of Engineering

Gertjan Medema is a principal scientist in microbiology at KWR, where he has worked for 30 years. He is also Professor of Water & Health at Delft University of Technology. Medema has played a leading role in developing detection methods for waterborne pathogens, quantitative risk assessment, pathogen removal in water treatment, and, more recently, wastewater surveillance of infectious diseases—a technique now applied worldwide. In 2024, he received the Lee Kuan Yew Water Prize for this work, recognising his exceptional contribution to solving global water challenges through innovative technologies.

Recognition for an exceptional contribution to engineering

Election to the National Academy of Engineering honours individuals who have made outstanding contributions to engineering research, practice, or education. International members are recognised for achievements that represent significant advances in engineering and technology and have contributed to the well-being of society worldwide. Medema was chosen for “developing water pathogen measurement methods and applying them globally to reduce infectious disease risk.”

Bridging science and practice in water quality research

Medema views his election as an International Member of the U.S. National Academy of Engineering as recognition of his efforts to bridge the gap between science and practice in water quality research. It also reflects the long-term collaboration between KWR, TU Delft, and the Dutch water sector. “Thanks to this connection, we can truly create impact,” he says. “I am grateful to work in this environment, together with all colleagues who have contributed to this.”

Molecular detection methods for pathogens

Medema’s main areas of expertise include detection methods, transmission, risk assessment, and epidemiology of waterborne pathogens. He is a leader in molecular detection techniques, Quantitative Microbial Risk Assessment, and research into pathogen removal using engineered and natural water treatment systems (including the use of native viruses). Drawing on this expertise, he advises the World Health Organization (WHO) on safe water systems.

National Academy of Engineering

The National Academy of Engineering, founded in 1964, is a private, independent institution dedicated to advancing engineering leadership in service to the nation and the world. International Members represent the highest level of global engineering leadership.