Governments worldwide face a complex landscape marked by short-term crises, long-term priorities, declining public trust, and the pressing need for environmental and digital transformation. Addressing these cross-cutting challenges requires governance systems that are capable of strategic planning, whole-of-government co-ordination, and sustained performance management. Thailand is committed to strengthening its public governance to better manage these transitions, with the net zero goal serving as a test case for improving institutional co-ordination, stakeholder engagement, and policy delivery. This report assesses how Thailand's centre of government (CoG) institutions can be equipped to steer complex, cross-cutting policy agendas more effectively. Drawing on OECD standards and comparative practices, it provides practical recommendations to clarify institutional roles and responsibilities, strengthen policy development practices, and enhance monitoring and accountability mechanisms. These reforms aim to support more coherent, citizen-centred, and forward-looking public governance in Thailand, contributing to the country's ambitions and development goals.