Public infrastructure relies heavily on effective maintenance management to ensure the safety, reliability, and longevity of equipment and facilities. However, many government agencies still operate under a reactive maintenance strategy, responding only when equipment fails. This study, conducted at the Department of Public Works and Highways (DPWH) Regional Office I – Equipment Management Division (EMD), explores how transitioning to a proactive approach through the implementation of a Computerized Maintenance Management System (CMMS) can enhance operational efficiency. Using a qualitative case study design, data were gathered from division heads, section supervisors, and maintenance personnel through interviews, site inspections, and analysis of maintenance logs. Results reveal that the existing Excel-based maintenance system lacks scalability, accuracy, and real-time data integration, contributing to frequent breakdowns, high repair costs, and inefficiency. The study highlights the potential of CMMS to transform maintenance management by reducing downtime, improving cost efficiency, and enabling predictive maintenance through data-driven insights. Findings further emphasize the importance of staff training, leadership support, and policy integration for successful CMMS adoption. The study concludes that transitioning from reactive to proactive maintenance using CMMS is essential to achieving sustainable infrastructure management.