Funds from this grant provide 21 months of support for the continued operation of the Deep Carbon Observatory’s Synthesis Group 2019 (SG 2019). Led by University of Cambridge geologist Marie Edmonds, SG 2019 is tasked with overseeing and managing the synthesis of the intellectual output of the DCO, bringing together into a coherent whole the diverse observations, insights, models, and datasets generated over the past 10 years by hundreds of DCO scientists across the globe. Funded activities include the writing of a decadal report summarizing the DCO’s scientific and technical accomplishments; the planning and execution of several culminating events in 2019; the production of infographics, videos, and educational materials based on DCO insights; and the production of several synthesis papers for publication in high-value journals like Nature and American Mineralogist. Grant funds will provide administrative and travel support to Edmonds, allowing her to work closely and effectively with DCO leadership in the United States and around the world.