She has served in many leadership positions throughout the years. She has been the Director of the Prevention and Recovery in Early Psychosis Program (PREP), the Director of Adult Outpatient Psychiatric Services and is currently the Director of Quality Improvement and Services Outcome Research. Dr. Rosen has conducted extensive research on issues involving the symptoms and longitudinal course of psychosis. Her research has focused on the phenomenological aspects of psychosis, hallucinations, delusions, metacognition and self-disturbances. Much of Dr. Rosen’s research follows mixed-methods research designs to elucidate findings that include the subjective experience. Additionally, her research also investigates the underlying epigenetic mechanisms of psychosis.