This report discusses the implementation of the Technical Assistance (TA) project delivered by ICD and CDOT to build capacity in macroeconomic analysis and forecasting in the Ministry of Planning and Investment (MPI) that later merged with the Ministry of Finance (MOF) in early 2025. The TA supported the Core Working Group (CWG) in developing and customizing macroeconomic projection tools for Vietnam, operating the tools to produce consistent projections across all sectors, performing policy simulations, and presenting the results to policymakers in policy discussions. This report presents the TA achievements, lessons learned, and recommendations to strengthen and sustain capacity development.