Miranda Ballentine is the CEO of REBA, an alliance of clean energy buyers, developers, service providers, and NGOs that are unlocking the marketplace for a cleaner, prosperous, zero-carbon energy future. REBA members were involved in 100 percent of corporate large renewables deals in 2018. Ballentine was previously CEO of Constant Power, a DER company, as well as managing director of RMI’s Business Renewables Center. From 2014-2017, she served President Obama as assistant secretary of the Air Force (Installations, Environment, and Energy). She was responsible for a US$9 billion energy budget and launched the Resilient Energy Demonstration Initiative, developing clean, cyber-secure microgrids. Previously, Ballentine was Walmart’s director of sustainability for renewable energy. She led a global team to achieve Walmart’s 100 percent renewable energy goal, identifying more than US$1 billion in annual energy savings and 9 million metric tons of avoided GHGs.