This book seeks to bridge the gap between geophysics and geotechnical engineering, illustrating the fundamental concepts of seismic methods, providing practical guides of these methods to different engineering applications, and equipping professionals with the knowledge and tools needed to navigate the dynamic realm of geotechnics through the seismic lens. Meanwhile, this book, which accompanies the 2025–2026 Distinguished Instructor Short Course, will also open new areas of applications to the next generation of applied geophysicists.