Dr. Hyung-Sool Lee is an Associate Professor in the Department of Civil and Environmental Engineering and is also the Director of the Waterloo Environmental Biotechnology Lab at the University of Waterloo.

His research mainly involves fundamentals and applications of Microbial Electrochemical Cells (MECs) for resource-recovering waste and wastewater treatment, bio-batteries, and biosensors. In addition, Professor Lee has worked for anaerobic membrane bioreactor, dark fermentation, and anaerobic methane oxidation coupled to denitrification.