Mw. J. Staal is working as a neurologist at the Heart + Vascular Center and the Department of Neurology at the MUMC +. She is specialized in the neurovascular disorders (disorders of the blood vessels in the brains), such as stroke and vascular malformations in the brains.
Besides her work in health care, she conducted research mainly in the field of disease 'cerebral small vessel disease. She obtained her PhD in 2009 with a thesis entitled "The role of haptoglobin phenotype and 24-hour blood pressure characteristics in cerebral small vessel disease. She is also involved in the training of doctors in training to become a neurologist, training of medical students and the education of medical students at the University of Maastricht.