Slope stability is vital in civil, geotechnical, and environmental management, ensuring safety, reliability, and functionality for natural and engineered slopes. It depends on material properties, water conditions, geological features, slope geometry, and external factors like human activity and weather. In March 2020, a major landslide along the Amman-Na’ur-Dead Sea Highway spanned over 200 meters, completely closing this key road. This area is known for instability due to water springs. This study investigates the landslide through geotechnical analysis and proposes a pile wall retaining system to stabilize the slope and prevent future closures. Using PLAXIS 2D, various pile configurations were tested, with lengths of 35–45 m, diameters of 0.8–1.4 m, and spacing of 2–4.9m. The proposed system improved stability and achieved the required safety factor.