Jos Vaessen (PhD) is evaluation advisor at the Independent Evaluation Group (since 2016). Between 2016 and 2022 he led IEG’s Methods Advisory Function. Since 2021 he has taken on a leading role in the Global Evaluation Initiative. Jos has been working in evaluation research since 1998. He has conducted and led evaluations for multilateral and bilateral development organizations in a range of policy fields such as agriculture, environment, science, education, health and others. He has delivered numerous trainings and talks on evaluation practices and systems across the globe. Jos has authored several internationally peer reviewed publications, including three books. His most recent book is titled Evaluation of International Development Interventions: An Overview of Approaches and Methods. 

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