Geraldine is a doctor of clinical pharmacy who for the past sixteen years has specialised in drug information services. Based at the Mater Hospital in Brisbane, Geraldine manages the Adverse Medicine Events Line, a national service for adverse drug reaction reporting by consumers.

Geraldine contributes much to health professional education, lecturing at the University of Queensland, QUT and Bond University for undergraduate and postgraduate pharmacy, podiatry, optometry, dental, nursing and medical students. She is also a member of several boards and committees including the Pharmaceutical Society state branch council and the Pharmaceutical Beneifts Advisory committee for Veterans Affairs. However, she is perhaps best known for her regular appearances on radio and TV as a pharmacy spokesperson