This final report presents the outcomes and key insights from the training on Open Science and Evidence-Informed Decision Making. Designed to strengthen the capacity of policymakers, civil servants and knowledge brokers involved in decision making, the training explored how Open Science practices and evidenceinformed approaches can enhance policy effectiveness and transparency. The report outlines the processes followed in the design and delivery of the training, including learning objectives, structure, participant engagement and evaluation results. It also includes insights from national sessions held in each participating country, highlighting the training’s impact across diverse settings.