Dr Paul N. Williams is a fellow of the Institute for Global Food Security, Director of Queen’s University Belfast’s Agricultural Technology Degree, and Senior Lecturer in Soil & Environmental Biogeochemistry. Paul’s research interests centre on environmental/elemental metrology, understanding plant-soil interactions and improved soil management. With over twenty years of experience investigating the widespread issue of arsenic and cadmium contamination in rice, he has followed this topic from the grain down into the soil. It is in this latter aspect, especially, that Paul has actively used DGT/DET for trace-element speciation, predicting bioavailability, modelling and high-resolution (sub-mm) 2D imaging. Using a range of other complementary methods such as multi-element chromatography (IC-ICP-MS), laser-based analytical measurement (LA-ICP-MS), optical sensors (planar optodes), in-situ UV/vis spectrometry and XRF analysis, his work has taken him to mining impacted sites in China, the peat swamp forests of Malaysia, uranium mine restoration projects in Brazil, and onto artisanal gold mining investigations in the rainforests of Guyana. In addition to a holding a senior editorial role in the Springer-Nature journal Exposure & Health, Paul sits on the editorial advisory board for the ACS journal ES&T and has held an editorial board position with Environmental Pollution for >15 years.