William F. Guthrie received a B.A. degree in mathematics from Case Western Reserve University in Cleveland, OH, in 1987 and an M.S. degree in statistics from The Ohio State University in Columbus, OH, in 1990. He is currently a mathematical statistician in the Statistical Engineering Division at the National Institute of Standards and Technology (NIST) in Gaithersburg, MD. Since joining NIST in 1989, he has collaborated with scientists and engineers on applied research in a wide range of areas including semiconductor and microelectronics applications, building materials and fire research and chemical science. His statistical interests include uncertainty assessment, Bayesian statistics, design of experiments, calibration, modern regression methods, and statistical computation.