I am an ARC Australian Laureate Fellow in the School of Physics at the University of Melbourne. My primary research interests lie in the field of quasar formation and reionisation in the early universe. In particular I am interested in the evolution of the earliest galaxies and how this evolution may be studied with the next generation of radio telescopes. I also work in the field of gravitational lensing. Specifically, I study problems in quasar microlensing, and the statistical properties of gravitational lensing by galaxies.