Background: Sustainable organizational change has become one of the greatest challenges facing contemporary businesses. The metal manufacturing industry is important in the transition, due to its impact on global GDP and the climate. SMEs covers a large portion of the metal manufacturing industry, where their transformation is crucial as well. Problem: Despite the importance of sustainable change, there is limited research on how manufacturing SMEs can effectively manage a sustainable transformation. This gap necessitates elucidating the context of SMEs in sustainability, and exploring methods for sustainable change management within these organizations.  Purpose: The aim of this research is to explore sustainability and organizational change in the context of manufacturing SMEs, to provide a deeper understanding on how manufacturing SMEs can sustainably transform their business activities through adequate methods and processes. Method: This research takes on the philosophical position of critical realism and utilizes a qualitative, explorative, and inductive approach. Semi-structured interviews were conducted with ten managers from manufacturing SMEs. A thematic analysis was also adopted to extend the previous research.  Conclusion: Manufacturing SMEs adopt various sustainability activities, in line with the triple bottom line. They are also going towards a more formal approach for sustainability. Economic performance and sustainability go together for manufacturing SMEs, whereas more knowledge is connected to higher altruistic motivations and clear sustainability strategies. A combination of continuous incremental and transformational change is evident. This research found a six-step process for SMEs sustainable change management, elucidating their more flexible and adaptive culture alongside specific advantages and challenges. Their capabilities of learning and an informal culture facilitates fast decision-making and the continuous improvement of their practices, facilitating economic performance and sustainable change.