Energy efficiency and conservation are critical global issues due to rising energy demand, escalating electricity prices, and the environmental impacts of energy generation, including greenhouse gas emissions. This study aimed to develop energy conservation measures to improve energy efficiency in a Philippine government military facility through a preliminary energy audit. A walkthrough audit was conducted to identify potential energy wastage, while electricity billing records from January 2019 to December 2023 were analyzed to observe trends and project future energy consumption and electricity prices. Prioritization techniques were employed to develop energy conservation measures. The results showed a consistent increase in energy consumption, with a noticeable surge in electricity costs after the end of the COVID-19 pandemic. The audit revealed that cooling, office equipment, other loads, and lighting accounted for 63.34%, 24.49%, 8.97%, and 3.19% of the total energy consumption, respectively, with cooling loads being notably higher than in similar studies. This suggests a need to improve the efficiency of air conditioning and fan systems. Additionally, 48.2% of lighting loads still use outdated, inefficient fluorescent lamps. The study also highlighted that energy consumption patterns varied across different buildings and floors, indicating that tenant behavior and demand significantly influence energy use. This research provides valuable insights and opportunities for improving energy efficiency in government military facilities, offering a framework for similar institutions seeking to optimize energy consumption.