NAS Jacksonville is the Navy’s master anti-submarine warfare base and home of the Atlantic fixed and rotary wing anti- submarine forces. In order to meet mission, sustainability, and energy goals, a comprehensive assessment and preliminary design for completely rehabilitating the entire aging airfield electrical system was performed. The project goals were driven by an immediate need to determine the costs and timeline for improving the airfield to receive the Navy’s newest anti-submarine aircraft; the P-8A and the MH-60R. A comprehensive airfield electrical system inventory and condition assessment was conducted. This effort resulted in a detailed plan for executing a multi-year plan for over $50 million of major airfield improvements at NAS Jacksonville. The plan was structured so that it could be executed in a phased manner and without mission impact.