David Stillman is Section Manager of the Department of Space Studies and a near-surface geophysicist specializing in detecting water in any form — liquid, ice, or adsorbed — on planetary bodies. His research integrates laboratory electrical properties measurements, field geophysics, remote sensing data analysis, and instrument development. Stillman has authored more than 30 peer-reviewed publications on topics spanning martian recurring slope lineae (RSL), radar sounding of icy bodies, and the dielectric properties of planetary analogs. He has conducted global mapping of martian RSL and dark slope streaks, characterized their seasonality and spatial distributions, and developed hydrological and thermal models to constrain their formation mechanisms. His laboratory work on brine electrical properties has been central to interpreting the anomalously bright basal radar reflections detected by MARSIS (Mars Advanced Radar for Subsurface and Ionosphere Sounding) aboard ESA’s Mars Express spacecraft beneath the south polar layered deposits of Mars. He is the project scientist on the Lunar Magnetotelluric Sounder (LMS), which flew to the lunar surface aboard Blue Ghost Mission 1 in 2025, and serves as a science Co-I on the Lunar Interior Temperature and Materials Suite (LITMS) for the CLPS CP12 mission to Schrödinger basin. He is currently developing ground-penetrating radar systems for subsurface investigation on the Moon and Mars. Stillman earned a B.S. in Geophysical Engineering and a Ph.D. in Geophysics with a minor in Hydrology, both from Colorado School of Mines.