This report, "Engineering and Construction for Sustainable Development in the 21st Century: Assessing Global Research Needs", identifies key engineering research and construction issues for the twenty-first century which support sustainable development. The contents of this report reflects the findings of a two-phase Delphi survey involving construction industry experts from over twenty countries. This report was prepared to provide the technical context for an international research symposium hosted by the Civil Engineering Research Foundation in Washington D.C. on February 4-8, 1996. The intended audience includes worldwide representatives from government, academia and business involved in engineering and construction research. The report is organized around five focus areas: Management and Business Practices, Design Technology and Practices, Construction and Equipment, Materials and Systems, and Public and Government Policy. A team of international experts from engineering and construction disciplines author the five papers comprising this report. Each paper covers research needs and barriers to implementation of new technologies and practices. The papers explore opportunities for international cooperation, present case studies of successful research efforts and offer preliminary recommendations to enhance the effectiveness of research in their respective areas. The papers are preceded by an introduction that address the conceptual links among the papers within the context of sustainable development.