Dr. Mark R. Jacobson is a Senior Transatlantic Fellow at the German Marshall Fund of the United States and the former Deputy NATO Senior Civilian Representative in Afghanistan. He has served in a number of positions at the Department of Defense and was a professional staff member at the U.S. Senate Committee on Armed Services. A Senior Adviser for the Truman National Security Project. He holds a Ph.D. in Military History from The Ohio State University and has served for almost 20 years as a military reservist.