Derek is a Postdoctoral Fellow and joined the research group in December 2015. His interests are in geobiology and geochemistry. Derek completed a Ph.D. at Dartmouth in 2013, where he focused on purple sulfur bacteria. He has done extensive research at the Geophysical Laboratory of the Carnegie Institution of Washington, where he worked with Marilyn Fogel, and at the California Institute of Technology, where he worked with Victoria Orphan. At Washington University he focuses on sulfur and oxygen isotope fractionation by sulfate reducing bacteria.