Daniel Gerstein is a security and defense expert, technologist and author. He has held senior positions in uniform, as a senior government civilian, in industry, in think tanks and in academia. During his service in the U.S. Army, he served on four continents while participating in combat, peacekeeping, humanitarian assistance, counterterrorism, and homeland security and served for more than a decade in the Pentagon in various high-level staff assignments. At the Department of Homeland Security, he served as Under Secretary (Acting) and Deputy Under Secretary in the Science and Technology Directorate. Dr. Gerstein also has extensive experience in international negotiations, having served on the Holbrooke Delegation that negotiated the peace settlement in Bosnia. He is also an Adjunct Professor at American University in Washington, D.C. and George Mason University in Fairfax, Virginia. He graduated from the United States Military Academy and has master’s degrees from Georgia Tech, the National Defense University and the U.S. Army Command & General Staff College, and a PhD in Biodefense from George Mason University. He serves as a member of several corporate boards and advisory committees.