Geoff identified the relict chloroplast in malaria parasites and is unravelling what the relict chloroplast does and how it can be targeted with antimalarial drugs. He has published 219 papers, many in high profile journals such as Nature, Science, EMBO J, Current Biol and PNAS. He has 41 papers with more than 100 citations, 15,700 career citations, and an h-index of 63. Geoff has been awarded the Goldacre Medal, the Australian Academy of Science's Frederick White Prize, two Howard Hughes Medical Institute Scholar’s awards, The David Syme Medal, the Woodward Medal for excellence in Science & Technology, the Julian Wells Medal, the Miescher-Ishida Prize, the Royal Society of Victoria Medal, The Ramaciotti Medal, and is a Fellow of the Australian Academy of Sciences and a Fellow of the American Academy of Microbiology.