Deep Carbon Observatory (DCO) is a decade-long scientific endeavor to understand carbon in the complex deep Earth system. Thousands of DCO scientists from institutions across the globe are organized into communities representing four domains of exploration: Extreme Physics and Chemistry, Reservoirs and Fluxes, Deep Energy, and Deep Life. Cross-community and cross-disciplinary collaboration is one of the most distinctive features in DCO's flexible research framework. In order to expedite research collaboration between DCO scientists and communities, the DCO Data Science team developed an infrastructure that integrates multiple open source software including Drupal, CKAN, VIVO, Handle, etc. This infrastructure not only serves as a registry and a repository of DCO resources such as datasets, documents, images, and videos, it also formulates a rapidly growing knowledge base that interconnects people, organizations, publications, activities, locations, and other entities of research interest in DCO communities to enable better browsing, searching, visualizing, and reporting.