Yingxi Zhao is a Visiting Research Fellow at the Health & Social Care Workforce Research Unit in the Policy Institute at King's College London and a senior postdoctoral research scientist based in the University of Oxford Nuffield Department of Medicine. His research focuses on health systems and human resources for health, particularly healthcare workers’ experiences, using mixed methods research. His current work examines new and extended roles, including physician associates, in the UK NHS, alongside an NIHR Advanced Fellowship exploring the experiences of internationally recruited doctors and nurses in the UK. In addition, Yingxi is developing work on healthcare workers’ employee voice within healthcare systems. Prior to this, Yingxi worked in Kenya on medical doctors’ training, in Myanmar on ethnic health system strengthening and health workforce development, and in China on neonatal health. His research interests also include development assistance for health and health financing.