He is also a co-investigator on MRO’s Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) instrument, a co-investigator on the ExoMars Trace Gas Orbiter’s CaSSIS camera, and a collaborator on the Mars Science Laboratory (Curiosity rover) mission. His research centers on exploring the compositional stratigraphy of planetary surfaces (especially Mars) to infer how their environments evolved over time. He is the science theme lead for composition and photometry for HiRISE.