Department of Energy (DoE) congratulated Jonathan Pershing for his appointment as Special Envoy for Climate Change at the Department of State. Over his 3 years at DoE, Pershing served as Deputy Director of the Energy Policy and System Analysis office. Pershing, who was also part of core team designing Mission Innovation, was credited as being "instrumental" in analyzing USA's energy systems. He also led DoE efforts to support U.S. negotiating team prior to and at COP21 climate negotiations.