CTSC engaged DataONE, an NSF funded project under a Cooperative Agreement through the Division of Advanced Cyberinfrastructure (ACI), in a cyber-checkup -- a high-level review by CTSC of that project’s cybersecurity program. The engagement began with DataONE undertaking a risk-based survey designed to explore the current state of security within DataONE’s cyberinfrastructure (CI). To accomplish this, DataONE utilized CTSC’s Risk Evaluation Spreadsheet. CTSC and DataONE then focused on identifying key areas where DataONE could use its resources most efficiently to strengthen its CI. Finally, CTSC presented DataONE with a list of opportunities that describe new or updated mechanisms and/or policies in the aforementioned areas such that DataONE could continue to strengthen and advance their cybersecurity posture.