Professor Malcolm McCulloch is an expert in coral reef geochemistry at The University of Western Australia’s Ocean Graduate School, and a founding member of the ARC Centre of Excellence for Coral Reef Studies. He has been a leader in crustal and mantle evolution, cosmochemistry, and environmental geochemistry. His current research focuses on the important societal issue of how global climate and environmental changes are impacting marine systems, in particular the magnitude and impacts of anthropogenic CO2 driven ocean acidification and warming on both shallow-water and deep-sea coral reef environments. This research provides insights into the response of coral calcification to climate change as well as the longer-term changes in seawater pH that are now occurring in the oceans due to uptake of fossil fuel CO2 emissions. He has been awarded an honorary doctorate from Curtin University, the Ringwood Medal from the Australian Geological Society, and the Jaeger Medal for career excellence in the Earth sciences from the Australian Academy of Sciences.