Gregory received his BSc in chemistry and PhD in computational inorganic chemistry from The University of Queensland in 1999. He has worked as an instrumental chemist at QUT and as a senior analyst at Q-Pharm Pty Limited where he conducted LCMS and HPLC method development in support of clinical trials.
He has done similar LCMS method development on small-molecule drugs, toxins and metabolites at The UQ School of Medicine, The Queensland Brain Institute and The Fraser Institute. At the Fraser Institute, he was also involved in fluorescence microscopy and the development of population pharmacokinetic models for transdermal drug delivery.
He joined QAEHS as a senior research assistant/analyst in 2026.