Professor Roper is an adjunct professor with the College of Science at George Mason University and an expert in multiple technologies and methodologies that have engineering, environmental and public policy applications. He has spent a lifetime engaged in civil & environmental engineering and public policy. Dr. Roper has developed and led major R&D programs in areas such as dredging operations, wetlands, construction productivity, invasive species control, energy efficiency and geospatial technology. For many years, he has served as the director of the U.S. Army Corps of Engineers Worldwide Civil Works Research and Development Program as a Senior Executive Service (SES) official. Dr. Roper also served as director of the U.S. Army Topographic Engineering Center (TEC). His professional experience includes senior management positions in the U.S. Department of Transportation, U.S. Environmental Protection Agency, U.S. Army, Arlington County Government, academia and the private sector. Additionally, Dr. Roper has been active with the Water Science and Technology Board, the Infrastructure and Constructed Environment Board, and the Transportation Research Board of the National Academy of Engineering.