Thomas M. Holsen, Ph.D. is currently a professor in Civil and Environmental Engineering at Clarkson University and associate director of the Center for Air Resources Engineering and Science. He is a Board Certified Environmental Engineering Member, American Academy of Environmental Engineers and Scientists. In 1988, Holsen obtained a Ph.D. degree from the University of California at Berkeley in Civil and Environmental Engineering, where he earned his Bachelor of Science and Master of Science. 

Holsen focuses his research interests on the transport, transformations and fate of hydrophobic organic chemicals, mercury, metals, and ions in a wide array of environmental systems. His recent investigations have explored the atmospheric concentrations, sources, deposition and emissions of mercury to the Adirondack Mountains; concentrations of legacy and emerging persistent organic chemicals and mercury in the Great Lakes; and the transport, deposition and sources of pollutants in New York State. This work is shared regularly with students participating in his graduate course. Holsen’s research has appeared in over 135 publications and has been successfully applied to the supervision of research projects generated from industrial sources and State and Federal Agencies.