This book presents the results from the 2nd Olympiad in Engineering Science (OES2025), with a focus on the integration of computational and experimental approaches across core engineering disciplines. It brings together contributions on fatigue and structural integrity, fluid dynamics and marine technology, concrete structures, dynamics and vibrations, additive manufacturing, and asset integrity management. By combining theoretical research with experimental studies, the chapters highlight how modern computational tools and advanced testing methods are driving innovation in engineering design, simulation, and manufacturing processes.