Dr. Bill Retzlaff is a tenured professor at Southern Illinois University, joining the faculty in 1999 in the Department of Biological Sciences and the Environmental Sciences Program. He is currently a professor of biological sciences and serves as one of three associate deans in the College of Arts and Sciences.
Dr. Retzlaff earned a bachelor’s in forest management and a master’s in forestry from Auburn University. He earned a doctorate in forestry with a minor in plant physiology from Clemson University. His main areas of research interest include the evaluation of green roof and green wall technologies, sustainable green infrastructure, and sustainable use of residual waste products. Dr. Retzlaff is currently the research co-director of the St. Louis metropolitan area research collaboration (G.R.E.E.N. – Green Roof Environmental Evaluation Network) based at Southern Illinois University Edwardsville (SIUE), established to evaluate the performance of green roof technologies and other green infrastructure in the Midwestern United States. He has written numerous scientific articles on green roofs and mentored dozens of students.
G.R.E.E.N. was established to evaluate the performance of green roof technologies and other green infrastructure in the Midwestern United States. Their goal is to make the information available to users for the development and establishment of green roofs and other green infrastructure. He estimates that more than 100 students at SIUE have worked on green roof projects since G.R.E.E.N. was started in 2004 – many from the Department of Biological Sciences, the Civil Engineering Department, and the Environmental Sciences Program. Scholarly work from G.R.E.E.N. has been incorporated into direct and indirect teaching at SIUE.