His research and teaching focus on intelligence, terrorism, and international and homeland security, and his work has been published in Studies in Conflict and Terrorism, Intelligence and National Security, The Journal of Strategic Studies, and The Naval War College Review. He recently completed a book manuscript titled Preventing Surprise Attack: Intelligence Failure and Success from Pearl Harbor to the Present. He retired from the U.S. Navy in 2002 after serving 21 years as an intelligence officer, and received his Ph.D. from the Fletcher School of Tufts University.