She previously worked as a health policy analyst at the Altarum Institute and since then she has received numerous accolades for her research. One example is the VISN 1 Career Development Award for her paper "Characteristics of Outpatient Surgery in VISN 1 Medical Facilities." Her research mainly focuses on outpatients care after surgery. Dr. Mull is interested in technology to increase the efficiency of healthcare delivery and to improve quality of care. She works closely with the VA Boston Healthcare System and has participated in two projects on inpatient readmissions in VA.