has a BS in mathematics from Humboldt State University, Arcata, California and an MS and a PhD in Biostatistics from University of California Los Angeles. In 1981, after 3 y at Bell Labs, he began working on atomic-bomb survivor studies at the Radiation Effects Research Foundation (RERF) in Hiroshima, where he worked for the next 23 y. While at RERF he developed a class of risk regression models and modelling software that are widely used for dose‐response modelling in radiation epidemiology and other areas, took a lead role in the preparation of major reports on radiation effects on cancer and noncancer mortality and incidence rates in the survivor cohorts, and oversaw the implementation of two new dosimetry systems. He has had a 30 y association with the Radiation Epidemiology Branch of the National Cancer Institute and has worked on studies of the Russian Mayak Worker and Techa River cohorts for more than 25 y. Since returning to the United States in 2004, Dr. Preston has continued to work on the analyses of cancer risks in the atomic-bomb survivors, Mayak Workers, Techa River residents, U.S. radiologic technologists, and other exposed populations. Other professional activities include service as a consultant to United Nations Scientific Committee on the Effects of Atomic Radiation and various Biological Effects of Ionizing Radiation committees, as a member of the International Commission on Radiological Protection Committee 1, and as an associate editor of Radiation Research. He is a fellow of the American Association for the Advancement of Science and the American Statistical Association and an author of almost 200 peer‐reviewed articles.