Engineering education is pivotal in driving sustainable development forward, yet many engineers encounter hurdles stemming from insufficient preparation for sustainability challenges. A major factor contributing to this is the lack of a structured and practical framework to guide the integration of sustainability into engineering education. This study addresses this gap by presenting a system-based framework tailored to 'engineering education "as" sustainable development.' The framework outlines a dynamic and inclusive organisational system, incorporating inputs from key stakeholders, a value-and-belief subsystem, throughput processes, and resultant outcomes. These outcomes encompass the cultivation of a new cohort of engineering graduates equipped with sustainable development knowledge, skills, and values/attitudes, thereby fostering the sustainable well-being and prosperity of all stakeholders involved. Additionally, the study examines the intricate relationships, including feedback loops, among system components and concludes by offering insights for practitioners to consider for future action and implementation.