With colleagues from the United States and Europe, I have coedited four volumes in environmental history and the history of technology:
How Green Were the Nazis? Nature, Environment, and Nation in the Third Reich
coedited with Franz-Josef Brüggemeier and Mark Cioc (Athens: Ohio University Press, 2005)
Germany's Nature: Cultural Landscapes and Environmental History
coedited with Thomas Lekan (New Brunswick: Rutgers University Press, 2005)
The World Beyond the Windshield: Roads and Landscapes in the United States and Europe
coedited with Christof Mauch (Athens: Ohio University Press, 2008)
Rivers in History: Perspectives on Waterways in Europe and North America
coedited with Christof Mauch, (Pittsburgh: University of Pittsburgh Press, 2008).
Since the fall of 2002, I have been working at the University of Maryland, where I am based in the Department of History and hold a joint appointment with the A. James Clark School of Engineering. Besides teaching in the Department of History, I offer classes in the Gemstone Program and the College Park Scholars Program in Science, Technology, and Society. After a one-year position as a research fellow at the German Historical Institute in Washington, D.C., during the academic year 2002/2003, I was a Visiting Research Fellow at the GHI from 2003 to 2006. Since 2006, I have been a member of the editorial board of the Journal of Transport History.