Dr. Treiman's current work focuses on the Mars rover missions as a co-investigator with the CheMin instrument on the MSL Curiosity rover and the PIXL instrument on the M2020 Perseverance rover. For CheMin, he provides geological context and interpretation of the CheMin results (X-ray diffraction and fluorescence). For PIXL, he provides igneous petrology background and mineralogical interpretations of its elemental map data. Treiman is active in daily operations on both missions.