Malcolm is a Chemical Oceanographer at Plymouth Marine Laboratory in the UK, and is the Head of the PML Nutrient Facility. His specialist research areas are nitrogen cycling and nutrient studies of varying Oceanic environments. He also has developed novel analytical techniques and specializes in the analysis of nanomolar concentrations of phosphate, nitrate, nitrite, and ammonium nutrient concentrations for oligotrophic waters, in particular in the north and south Atlantic Oceans. He was, until recently, the co-Chair of a SCOR working group about nutrients with the aim to help to improve the quality of global nutrient analysis for Oceanic waters, and he was one of the authors of the updated 2020 GO-SHIP nutrient manual. He will try, where possible, to help other labs and to mentor early career researchers, and to pass on his many years of experience where it will help. He has been on over 100 research cruises all over the world for a variety of projects, including recently on a memorable Antarctic voyage to the Weddell Sea.