Yung-Tsun Tina Lee is a computer scientist in the Systems Engineering Group under the Systems Integration Division (SID) of the Engineering Laboratory (EL) at the National Institute of Standards and Technology (NIST). She joined NIST in 1986. Her major responsibility in recent years has been to develop information models to support various manufacturing application areas. She is currently the secretary of the Core Manufacturing Simulation Data (CMSD) Product Develop Group of the Simulation Interoperability Standards Organization (SISO). She is also a co-editor of the CMSD specification. She formerly served as the project manager of the Apparel Product Data Exchange Standard (APDES) Project sponsored by the Defense Logistics Agency. She has published more than 60 technical papers in the areas of information model, manufacturing simulation, and manufacturing standards implementations. Prior to NIST, she worked at the Contel Federal Systems, Sperry Corporation, and Research and Data Systems, Inc.