This book brings together a wide range of contributions that showcase the breadth and interdisciplinarity of contemporary STEM research, with a particular focus on engineering as a driver of innovation and societal progress. Drawing on chapters that span topics such as advanced materials and manufacturing, energy systems, sustainability strategies, chemical and environmental processes, digitalisation, artificial intelligence, biomedical applications, and emerging design and modelling approaches, the book reflects the diversity of current research efforts addressing complex global challenges. By compiling insights from an international group of researchers, the volume highlights both fundamental developments and applied solutions, offering readers an integrated perspective on how engineering knowledge is evolving across domains. Overall, the book serves as a platform for disseminating novel ideas and methodologies while fostering interdisciplinary dialogue among researchers, students, and professionals interested in advancing technological solutions for present and future societal needs.