He has participated on many planetary missions, including NEAR (XGRS), Mars Odyssey (GRS) and MESSENGER (XRS). He is currently working on three flight missions: as a co-investigator on LunaH-Map, a CubeSat mission scheduled for launch in 2019, as a co-investigator on the Lunar Exploration Neutron Detector (LEND) which is part of the science payload on the Lunar Reconnaissance Orbiter, and as a collaborator on the Dynamic Albedo of Neutrons (DAN) experiment on the Mars Curiosity Rover.