Dr Darren Gröcke is the Director of the Stable Isotope Biogeochemistry Laboratory (SIBL) at Durham University. SIBL has state-of-the-art gas source isotope mass spectrometers that are used for the investigation of archaeological, geological, biological and environmental samples. Darren has worked on a diverse array of materials from modern kangaroos, mammoths, black shales, killer whales, river sediment, beetles, Medieval and Roman humans, charcoal and cereal grains. Darren has nearly 30 years of isotope experience and over 180 peer-reviewed international publications. SIBL has helped train many PhD, MSc and undergraduate students in isotope geochemistry – many of them continuing with an academic career or employed in environmental consultancy or other employment opportunities. Over the past eight years Darren has become very invested in using macroalgae as a tool for monitoring pollution in the marine environment. This has culminated in several papers on translocating seaweed, nitrogen isotope labelling of seaweed, and using seaweed to determine sewage pollution on two North Atlantic islands.