Dr Ciara O’Sullivan

Dr. O’Sullivan is an Associate Professor of Medical Oncology focusing on clinical and translational research in breast cancer at Mayo Clinic in Rochester, Minnesota, USA. Other research interests include patient advocacy, and strategies to mitigate physician burnout and career attrition in Oncology. She received an NCI Research Specialist (Clinician Scientist) Award (R50) and a Breast Cancer SPORE Developmental Research Program award (Co-PI) in 2024. She is a prior recipient of an ASCO Career Development Award (2018) and a graduate of the ASCO Leadership Development Program (2026).

She has led three multisite investigator-initiated trials, including an FDA registration trial, CompassHER2 RD (A011801). She is a Alliance for Clinical Trials in Oncology breast committee member and serves on the ASCO Evidence-Based Medicine Committee. She is a Mayo Clinic Institutional Review Board Member and has participated in NCI and NTCN working groups. She also serves as a Physician Advisor for the Breast Cancer Support Network and regularly participates in patient support group meetings.