She is currently the supervisor of training at the Mater Hospital Brisbane, and has steered initiatives to improve the quality of teaching and supervision of registrars in this facility. In her research work, Dr McGrath has extensively studied the diagnostic and therapeutic applications of corneal debridement. Dr McGrath was awarded a Master of Philosophy in Ophthalmology for her publications in this area. Much of her later work has concentrated on tumours of the eye and periocular structures, including eyelids and optic nerve. Her research has been published in well-respected journals worldwide, and she has presented her findings at national and international conferences.