Ryan Fimmen is a research scientist at Geosyntec Consultants in Columbus, Ohio. Ryan started with Geosyntec Consultants in March 2011. Previously, he worked for 3 years at Battelle where he managed and worked on several projects with metals impacted sediments, soils and groundwater. Ryan’s primary job responsibilities include development and execution of bench-scale and field-scale research studies in the area of soil/groundwater remediation. His most recent project experience involves development of a suite of bench-scale experiments to determine the most effective strategy for remediation of mercury impacted lake and river (freshwater) sediments. Ryan has also worked with the EPA to develop a technical resource document on the topic of monitored natural recovery of sediments impacted with metal and/or organic contaminants. Ryan joined the Attenuation Processes of Metals and Radionuclides ITRC team in January 2009 and has worked closely with the team in integrating basic geochemical processes and principals into the technical regulatory guidance document. Ryan earned a bachelor’s degree in chemistry from Carleton College in Northfield, Minnesota in 1995, a master’s degree in chemistry from the University of Wisconsin-Madison in Madison, Wisconsin in 1998, and completed his doctoral studies in geochemistry from Duke University in Durham, North Carolina in 2004.