Gregory graduated with a Ph.D. in Statistics from the University of Maryland, Baltimore County in 2018. Prior to graduation, he completed a two-year Oak Ridge Institute for Science and Education (ORISE) fellowship at the U.S. Food and Drug Administration. Subsequently, he served as a postdoctoral fellow, and later research fellow, in the Biostatistics Branch of the Division of Cancer Epidemiology and Genetics at the U.S. National Cancer Institute. Gregory joined the Statistical Engineering Division at NIST in 2021. His primary research interests include the design and analysis of surveys, statistical inference with missing data, and statistical computing.