Dr. Keith Rust, a Vice President and Associate Director of Westat’s Statistical Staff, is a senior statistician with extensive experience in sampling methods, the design and specification of largescale sample surveys, and analysis of survey data. His areas of special expertise include methods for analyzing large, complex data sets; methods of deriving survey weights; and sampling error estimation procedures. He has applied his research and knowledge to a variety of education research projects over the past several years, both national and international. Dr. Rust has also directed work on Government sample surveys related to education, health, and social issues. He has experience teaching statistics, particularly relating to survey sampling, to a variety of audiences.