Funds from this grant provide three years of support for the expansion of a fellowship program hosted by the Research Data Alliance (RDA), an international community organization of researchers and innovators who have come together to build the social and technical infrastructure need to enable the open sharing of data. These fellowships offer summer funding and travel support to graduate students and postdocs with data science skills or training who will assist RDA’s various working groups on one or more specific projects.  To ensure that projects are aligned with each fellow’s primary work, the application process requires nomination by a candidate’s advisor or supervisor.  Sloan Foundation funds will support 30 fellows over the next three years.