Marcus H. Sachs (Technical Editor), P.E., is SRI International's Deputy Director of the Department of Homeland Security's Cyber Security Research and Development Center, a portfolio of several dozen cyber security R&D projects managed by DHS and supported by SRI. Marc also volunteers as the director of the SANS Internet Storm Center and is a cyberspace security researcher, writer, and instructor for the SANS Institute. After retiring from the US Army in 2001 following a 20-year career as a Corps of Engineers officer, Marc was appointed by President George W. Bush to serve on the staff of the National Security Council as part of the White House Office of Cyberspace Security from 2002 to 2003. Marc has contributed to Syngress titles IT Ethics Handbook, Cyber Adversary Characterization, and Zero-Day Exploits. Marc holds a Master of Science in Computer Science with a concentration in Information Security from James Madison University, a Master of Science in Science and Technology Commercialization from the University of Texas, and a Bachelor of Civil Engineering from the Georgia Institute of Technology. He is a graduate of the Army's Command and General Staff College, the Army Engineer School, the Army Signal School, and the Army's Airborne and Air Assault schools. Marc holds an advanced class amateur radio license, is a registered Professional Engineer in the Commonwealth of Virginia, and is a life member of the Signal Corps Regimental Association and the Armed Forces Communications and Electronics Association. A native of Tallahassee, Florida, he currently lives in Virginia with his wife and children.