The Office of Science and Technology Policy (OSTP) is the White House Department tasked with coordinating efforts across the federal government to develop and implement sound science and technology policy, evaluating the effectiveness of federal scientific research budgets and programs, and advising the President on scientific, engineering, and technological aspects of executive governance. Energy and environmental topics are playing an increasingly important role in OSTP’s work, with a consequent need for high quality scientific expertise to help inform policy advisory activities.  This grant supports an expansion of the Day One Project, an initiative by the Federation of American Scientists (FAS) that works with government agencies to identify the scientific and technical expertise needed to effectively fulfill their functions, to bring energy and environment expertise into OSTP.   Grant funds will enable an expansion of the Day One Impact Fellows program, allowing FAS to recruit a scholar with expertise on energy and environmental topics and place this individual within OSTP for a one-year fellowship, giving OSTP access to the impartial scholarly expertise needed to effectively fill its advisory functions. This grant also provides resources to develop a stronger cohort network of Impact Fellows working on energy and environment issues in different agencies.