In 2018, the Data and Scholarly Communication Services Unit (DSCS) at the University of Colorado Boulder began implementing two open access (OA) policy workflows with the aim of increasing content in the institutional repository CU Scholar, expanding awareness of the campus OA policy that was passed in 2015, and decreasing the burden on researchers for participation in the policy. DSCS leveraged collaborative relationships with other library departments and campus units in order to mobilize the data, infrastructure, procedures, and documentation to execute these workflows. The Directory of Open Access Journals (DOAJ) workflow identifies existing open access publications by CU Boulder faculty and mediates deposit in order to make them available in CU Scholar. The liaison outreach workflow partners with liaison librarians to request from faculty preprints and author’s final manuscripts of publications in which the publisher version may have copyright restrictions. At present, the DOAJ workflow has resulted in 754 articles deposited in CU Scholar, and the liaison outreach workflow has resulted in 91 articles deposited. Each of these workflows pose challenges that have required flexibility, experimentation, and clear communication between stakeholders. This case study, which includes detailed descriptions of both open access policy workflows, initial results, and plans for future implementation, may serve as a guide for other institutions wishing to adopt and/or adapt institutional repository workflows and forge collaborative relationships to further open access initiatives in their local context.