Jeff is the co-founder and chair of the scientific advisory board of Matatu. He is the Dr. Robert J. Glaser Distinguished University Professor and Director of the Center for Genome Sciences and Systems Biology at Washington University, St. Louis. He is a pioneer in our understanding of the function of the gut microbiome and he is a member of the National Academy of Sciences, the American Academy of Arts and Sciences and the Institute of Medicine of the National Academies.