Don Percival is a Principal Mathematician at the Applied Physics Laboratory, University of Washington, and an Affiliate Associate Professor, Department of Statistics, University of Washington. He received a B.A. from the University of Pennsylvania (1968; astronomy); an M.A. from George Washington University (1975, mathematical statistics); and a doctorate from the University of Washington (1983, statistics), where he was the first Ph.D. student to graduate from the Department of Statistics. Dr. Percival's research interests include spectral analysis, wavelets and use of statistical methodology in the physical sciences. He is the co-author (with Andrew Walden) of the textbooks Spectral Analysis for Physical Applications: Multitaper and Conventional Univariate Techniques (1993) and Wavelet Methods for Time Series Analysis (2000), both published by Cambridge University Press, Cambridge, England. Dr. Percival is an Associate Editor of the Journal of Computational and Graphical Statistics (a journal sponsored by the American Statistical Association).