Siegrist, leader of the environmental engineering group in ORNL's Environmental Sciences Division, joined the laboratory in 1990. The environmental engineering group conducts research and development in environmental restoration and waste management with focus on in situ treatment.
Previously, he was a senior scientist with the Norwegian Institute for Pollution Research, Aas, Norway; a research staff member at the University of Wisconsin; and a senior engineer with Owen Ayres and Associates, Madison, Wis.
A former resident of Waukesha and Madison, Siegrist received a bachelor's degree with high honors in civil engineering, a master's in civil and environmental engineering and a doctorate in civil and environmental engineering from the University of Wisconsin.
Siegrist is contributing editor for the Journal of Environmental Engineering and a registered professional engineer in Wisconsin and Minnesota. He is a member of the American Society of Civil Engineers' Publications Committee; the DOE Planning Committee for In Situ Remediation Technology Development; and the Water Environment Federation's Groundwater and Hazardous Waste Committees.
Siegrist and his wife, the former Sue Hintz, currently live in Boulder, Colo., with their son Jonathan.
The Oak Ridge National Laboratory, one of the Department of Energy's multiprogram national research and development facilities, is managed by Martin Marietta Energy Systems, which also manages the Oak Ridge K-25 Site and the Oak Ridge Y-12 Plant.