Ryan joined 698 in summer 2020, and was previously at Goddard from 2012-2018 with the Cryospheric Sciences Laboratory (615). He works on the Lunar Orbiter Laser Altimeter (LOLA) aboard the Lunar Reconnaissance Orbiter, primarily handling data processing and scientific analysis for LOLA's passive radiometry observations.
In his previous professional life (he's "early second career") Ryan was a glaciologist working on numerical modeling of ice sheets. He currently enjoys the different mathematical challenges posed by dealing with large datasets, and is becoming curious about ice throughout the solar system.