He is the author or co-author of 200+ peer-reviewed publications and currently serves as an associate editor of JGR-Biogeosciences. He is a pioneer in the field of biogeophysics, with a particular emphasis on the development of minimally invasive techniques for characterizing the subsurface activity of microbial communities and the end products of their metabolism. His current research interests include seasonal variations in redox-sensitive elements, such as C, N, S, Fe, and Mn, issues impacting the long-term mobility of contaminant metals in the subsurface, and the coupling of hydrological and biogeochemical processes that impact both.