This study investigates the axial compressive behavior of pre-damaged reinforced concrete (RC) columns retrofitted with a precast steel-reinforced grout jacket (PSRGJ). The necessity for effective retro-fitting methods arises from the structural deficiencies of aging RC columns, particularly those designed before modern seismic codes. Traditional retrofitting techniques, such as steel and concrete jacketing, are often labor-intensive and time-consuming, highlighting the need for efficient solutions. The PSRGJ combines a robust steel frame with early-strength cementitious grout prepared in 1:2 cement to sand ratio, allowing for rapid off-site fabrication and swift deployment in critical situations. Comprehensive axial compression tests were conducted on columns subjected to varying levels of prior damage to assess metrics like peak load capacity, ductility, and stiffness. Results demonstrated significant enhancements in structural integrity, with PSRGJ achieving improved load-carrying and deformation capacities compared to unretrofitted columns. The findings conclude that PSRGJ represents a promising advancement in retrofitting technology, effectively addressing the limitations of traditional methods while enhancing the seismic resilience of aging infrastructure. This approach not only fosters public safety but also aids in the preservation and longevity of existing structures in earthquake-prone areas, thereby contributing to greater overall infrastructure resilience.