The research achievements of Professor McCulloch have encompassed a broad range of Earth and Environmental science problems, ranging from understanding how river flood plumes have impacted coral reefs, sea level changes during the Last Interglacial period, through to processes responsible for the differentiation of the Earth’s continental crust. The common theme of his research has been the innovative use of isotopic and trace element geochemical techniques, over a wide range of timescales, to address important questions in the Earth Sciences. He has made important contributions in the understanding of both our contemporary environment as well as in the more established fields of Earth Science Geochemistry.