The past decade has demonstrated the utility of SESTAT, but the SESTAT design shows some deficiencies with respect to response rates, coverage of populations of interest, and its ability to support some useful analyses. To tackle those deficiencies, NSF has proposed three possible design options for improving the database and asked the National Research Council's Committee on National Statistics (CNSTAT) to form the Committee to Review the 2000 Decade Design of the SESTAT. This is the report of that committee. It presents our understanding of the purposes and characteristics of the SESTAT, applies the criteria we believe are important for assessing design options for the database, provides our recommendation for the best approach to adopt in the 2000 decade, and offers our encouragement to NSF to pursue opportunities to improve the understanding of the numbers and characteristics of scientists and engineers in the United States.