Sebastian believes that a little joy goes a long way in solving the climate crisis. Since 2018, he has led initiatives to decarbonize the energy and transport sectors, green the financial system, and reduce climate disaster risk. He navigates the international financial architecture with conviction, helping banks adopt stronger climate policies with the support of thousands of Climate Leaders worldwide. That experience deepened during his tenure as President of the Graduate Student Government (2024–25) at Georgetown University. When he's not at work, you'll likely find him dancing or cooking something new.