Junium is a sedimentary and organic geochemist. His research focuses on the redox evolution of the Earth, specializing in biogeochemical cycling. He uses a range of geochemical tools, but focuses on the stable isotopes of nitrogen, carbon and sulfur, with a particular interest in compound-specific, stable isotope techniques. His research interests span the spectrum of geologic time from the Archean to modern systems. Currently, he is working principally on the Cretaceous and Neoproterozoic with an eye toward understanding future global change. Junium was recently awarded a CAREER grant by the National Science Foundation.