The Society of Hellman Fellows has selected me as a 2019 Hellman Fellow, for my research program: Using stars as gravitational antennae to measure dark matter. The Hellman Fellowship supports the research of assistant professors. This grant will help support the work of our group to use our Latte suite of FIRE-2 simulations to develop new dynamical models to measure the nature of dark matter, by using streams of stars as ‘gravitational antennae’ for interactions with dark-matter subhalos, thus translating dark-matter theories directly into measurable predictions for stellar dynamics.