An Liu currently serves as a clinical professor and the Director of Radiation Physics at the City of Hope National Medical Center. He is a board-certified radiation oncology physicist and plays an important leadership role in City of Hope’s clinical and research program. He is the past president of AAPM in the Southern California Chapter and became a Fellow of AAPM in 2021. He has over 30 years of experience in the field of Radiation Oncology and has published extensively, lectured, and conducted workshops on medical physics and healthcare management in both the US and Asia. He earned his B.S. in physics from Beijing University and later earned his Ph.D. in Biomedical Physics from the UCLA School of Medicine.