Before GCF, Oscar served as the Chief Impact Officer at the Global Energy Alliance for People and Planet, responsible for Monitoring, Evaluation and Learning. He has more than 25 years of experience in leading strategic planning, evaluation, learning and results-based management initiatives, including authoring two books and numerous reports and articles on development and evaluation. He has served across three UN agencies in senior management roles, including Director of the Independent Evaluation Office at UNDP, led Green Economy Advisory services at UNEP, Director of the Independent Office of Evaluation at IFAD and Chair of the United Nations Evaluation Group, and the Evaluation Cooperation Group of international financial institutions. He holds a master’s degree in organisational change management from New School University and an MBA from the Bolivian Catholic University in association with the Harvard Institute for International Development.