The COVID-19 pandemic has underscored the importance of resilience, adaptability, and innovative strategies in addressing its widespread impact on health, the economy, education, and social structures. As the world transitions into the post-pandemic era, the priority is not only recovery but also the establishment of systems capable of withstanding future crises. This requires a multidisciplinary approach that draws on expertise from various fields, while prioritising community engagement and empowerment. This concept highlights the significance of cross-sector collaboration—spanning health, education, the economy, technology, and the social sciences—to design and implement strategies that are inclusive, sustainable, and adaptable. Community engagement is central to this approach, ensuring that solutions are not only effective but also contextually relevant, culturally sensitive, and widely accepted by the target population. This book is the result of the 9th International Online Community Service Series (PkM OSA Batch 9), undertaken by lecturers affiliated with the Indonesian Association of Community Service Lecturers (ADPI). It presents various models and themes for community service programmes across different fields, serving as a valuable reference for academics, particularly lecturers. Titled International PkM OSA Batch 9: Post Covid-19 Strategies: Community Engagement through Strengthening and Collaboration among Multidisciplinary, this book is dedicated to the field of education and aims to inspire university lecturers to explore new ideas and actively implement community service programmes. We hope this book will make a meaningful contribution to building a stronger, more resilient world and fostering better cross-sector collaboration to address future challenges.