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Jaynie Vonk

Jaynie Vonk

Global Advisor – Impact Evaluations


Office Location: The Hague

Jaynie conducts Effectiveness Reviews and other impact evaluations with Oxfam. She promotes evidence-based learning, accountability, and understanding of programme results. Jayne leads on the development of sustainable water and sanitation measurement tools.

Prior to joining Oxfam, she managed impact evaluations with Innovations for Poverty Action, the International Growth Centre and as a Boren Fellow. The themes of this work included financing mechanisms for electricity expansion, handwashing behaviour change in schools, household willingness to pay, and the sustainability of biosand water filters. Jaynie was also an environmental engineer with the US Environmental Protection Agency, overseeing revolving funds and grants for water, wastewater, and stormwater infrastructure. As a volunteer for Engineers Without Borders USA, she has worked with rural WASH (Water, Sanitation And Hygiene) systems in Kenya, Cambodia, and El Salvador.

Jaynie holds master's degrees in Public Policy and Environmental Engineering and a bachelor's degree in Mechanical Engineering from Oregon State University.