Prior to joining NASA Headquarters, Will served as a Research Meteorologist for the Global Modeling and Assimilation Office at NASA Goddard Space Flight Center, where he focused on satellite data assimilation. He led the Atmospheric Observations group and worked towards the additional and improved use of satellite observations within the GMAO system. His efforts targeted past, present, and future observations through his work on reanalysis, near real-time atmospheric modeling and data assimilation systems, and Observing System Simulation Experiments (OSSEs). His research spanned a broad range of remotely sensed and conventional observations. Additionally at Goddard, he served as the first Project Scientist for the CSDA Program, assisting in the onramp and evaluation of new data vendors.