Energy Performance Contracting (EPC) can be used by local governments to contract energy services companies (ESCOs) to leverage energy savings to implement a wide-range of decarbonization and resiliency measures. Such measures not only reduce capital and operating costs, but can also lead to significant decarbonization and increased resiliency of built-environment and transportation assets. The County of Maui (CoM), Hawaii initiated an EPC program in 2018 which, in addition to cost savings, has resulted in significant advancements in decarbonization and resiliency. A literature review was conducted to identify best practices and lessons learned in EPC applied within local governments. A case study approach was also used based on the author’s direct experience serving as a lead member of a team within the CoM who planned and implemented EPC within the organization over a four-year period from 2018–2022. A qualitative and quantitative assessment of decarbonization and resiliency benefits achieved by the CoM through its EPC initiative was conducted, as well as best practices for project development and project management. The CoM’s EPC program resulted in advancing decarbonization and resiliency in operations and infrastructure. This EPC program has resulted in the implementation of substantial energy and water conservation measures, renewable energy and energy storage measures, and clean transportation measures that may otherwise not have been implemented or would have taken significantly longer to implement. To address deferred maintenance, public procurement obstacles, and a lack of available budgets, local governments should utilize EPC as an important tool to advance decarbonization, resiliency, and equity within their organizations and local communities.