Zachary analyzes horrible ways people kill one another: drone swarms, weapons of mass destruction, and apocalyptic terrorism. His work has been published in a wide range of popular, wonky, and peer reviewed outlets, including Foreign Policy, Slate, the Brookings Institution, War on the Rocks, and the Nonproliferation Review. Journalists have written about and shared that research in The New York Times, NPR, Forbes, the New Scientist, the BBC and a couple dozen others in a couple dozen languages.

Officially, Zachary is a Policy Fellow at the Schar School of Policy and Government, 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 a Senior Consultant at ABS Group. He has approximately 4.5 years in federal government consulting, conducting risk assessment, futures analysis, doctrine analysis, organizational strategy assessments, systems thinking analysis, literature review, and open source research for numerous offices within the Departments of State, Defense, Commerce, and Homeland Security.