Paul Zarchan holds a BSEE from City College of New York and a MSEE from Columbia University. He has more than 40 years of experience in missile guidance and control. He worked as principal engineer for Raytheon, as senior research engineer with the Israeli Ministry of Defense, as a principal member of the technical staff at the Charles Stark Draper Laboratory, and as a member of the technical staff at MIT Lincoln Laboratory, working on problems related to missile defense. He is also the author of Fundamentals of Kalman Filtering.