Kirigami—the traditional Japanese art of paper cutting—introduces strategically patterned cuts into thin sheets, enabling flat sheets to undergo large, controlled deformations and form predictable 3D shapes. Its advantages include ease of fabrication (e.g. laser cutting), and a large design space—ranging from simple ribbon cuts to more complex closed-loop geometries— capable of producing wide range of motion and tuneable mechanical responses [1]. When applied to metals such as aluminium, Kirigami provides remarkable stretchability without material failure, making it an excellent candidate for energy-dissipating devices. By tailoring the cut geometry, Kirigami designs can be adapted to meet distinct energy dissipation requirements across a wide range of engineering applications. In this study, Kirigami-inspired designs are implemented in two energy-dissipating devices: a fall arrest system [2] and a metallic yielding seismic damper. A comprehensive investigation—combining reduced-order analytical modelling, finite element analysis, and experimental testing—was conducted to evaluate the mechanical response and energy-dissipation performance of the metallic Kirigami structures. Strong agreement among analytical, numerical, and experimental results confirms the reliability and robustness of the developed models. The reduced order models were also used to develop design protocols for both devices. Additionally, repetitive loading tests were performed on selected geometries to assess the influence of the cut pattern on fatigue life. The findings show that metallic Kirigami offers a simple and versatile method to manufacture energy dissipating devices with a wide range of applications.