Zachary is a Policy Fellow at the Schar School of Policy and Government, a Fellow at the National Institute for Deterrence Studies, a Research Affiliate with the Unconventional Weapons and Technology Division of the National Consortium for the Study of Terrorism and Responses to Terrorism (START), an officially proclaimed U.S. Army "Mad Scientist," and Senior Consultant at ABS Group.

He has published over 50 articles on autonomous weapons, weapons of mass destruction, and apocalyptic terrorism in a wide range of peer-reviewed, wonky, and popular outlets, including the Brookings Institution, Foreign Policy, Slate, Terrorism and Political Violence, and Parameters. Journalists have written about and shared that research in the New York Times, NPR, Forbes, the New Scientist, WIRED, and the BBC, among dozens of others in dozens of languages.