The University of California-Berkeley Energy Office has developed a homegrown retrocommissioning (RCx) program that analyzes energy data, operations, schedules and sequences to show how RCx benefits occupants, maintenance staff, and equipment life – beyond energy savings and carbon reduction. The Energy Office team also tamed a high-energy building by designing and installing a pony chiller. Through the RCx team effort, the EO has revealed a gold mine of RCx and capital improvements that address all the representative stakeholders’ goals. The UCB Energy Office team will also discuss their ambitious Clean Energy Campus project. Berkeley currently depends on steam and electricity from its natural-gas-fired cogeneration plant that serves over 100 buildings and 12 million square feet. The plant is nearing the end of its useful life and is responsible for 71% of the 190,00 metric tons of CO2e produced by the campus every year. The Berkeley speakers will discuss plans to replace the plant with a combination of electric heat pumps, on-site and utility-distributed clean electricity, efficiency measures, and battery and thermal storage.