David Vaccari is a Professor of Environmental Engineering and Director the Department of Civil, Environmental and Ocean Engineering at Stevens Institute of Technology in Hoboken, NJ. He has bachelor’s, master’s, and PhD degrees in environmental science, and a master’s degree in chemical engineering, all from Rutgers University. He is a licensed professional engineer, and a specialist in the modeling and control of biological wastewater treatment and in modeling the fate and transport of pollution in rivers and streams. This work has led him to develop new methods for nonlinear time series analysis in a wide range of applications. His work in pollution control and in long-term life support systems for NASA led him to an interest in phosphorus resources, for which he is engaged in modeling material flow analyses and in forecasting resource supply and demand. He is author of the textbook Environmental Biology for Engineers and Scientists published by John Wiley. He has been prominent on the educational front, currently as a member of the Board of Directors of ABET Inc., the engineering accreditation organization. He recently won the Wiley/AEESP award for outstanding contribution to environmental engineering and science education, and the American Council of Engineering Companies of New Jersey Educator-of-the-Year Award.