Leonard W. Casson, Ph.D., P.E., DEE is an Associate Professor of Environmental Engineering in the Department of Civil and Environmental Engineering at the University of Pittsburgh. Dr. Casson is a Professional Engineer in Florida and Pennsylvania.

Dr. Casson has also received speciality certification as a Diplomate in the specialty of Water Supply and Wastewater by the American Academy of Environmental Engineers. Dr. Casson is the author of over 40 papers in the water and wastewater treatment area.