Jennifer Marshall is an astronomical instrument builder in the Munnerlyn Astronomical Instrumentation Lab and has led the group's activities in several large collaborations, including the Dark Energy Survey and the HETDEX project. She is now the co-PI of GMACS, the wide field multi-object spectrograph that will be a first-light instrument for the Giant Magellan Telescope. Her scientific interests include the study of near-field cosmology, specifically using metal-poor stars found in the halo of the Milky Way to better understand the formation mechanisms of the Galaxy and of the Universe as a whole. She is also manages an REU-style program in Astronomical Research and Instrumentation , which provides research opportunities to talented undergraduates at Texas A&M to conduct scientific research with Texas A&M astronomers each summer.