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John Marshall Callahan

Adjunct Professor
Dr. John Callahan

Adjunct Professor


  • Public Affairs/Strategic Communication
  • Exercise and Wargame Development
  • Operations and Interagency Planning

Professional Experience

From 2007 to 2017, John served as a consultant to the Joint Public Affairs Support Element, U.S. Transportation Command, and the Undersecretary of Defense for Intelligence.  In this role, John has worked as a strategic communications planner as well as a Joint public affairs and media trainer for all of the U.S. Regional Combatant Commands.

Dr. Callahan served as Deputy Spokesman at the Office of the Director of National Intelligence, helping the Director, Ambassador John Negroponte, to communicate key messages of intelligence reform to the American people.  Prior to this, John was honored to be selected by the Department of Defense and the Department of State to serve as a Public Affairs Officer at the American Embassy in Baghdad, Iraq.  His missions there included working as an information officer for the Iraq Commission on Public Integrity and working as a portfolio press officer at the embassy.

John is a President of the International Ambassador Club, a global networking and humanitarian affairs organization.


Dr. Callahan received a Ph.D. in International Studies from Old Dominion University in 2015.  His dissertation examined U.S. foreign policy and strategic communication in humanitarian interventions.  His chapter on the information environment was published in April 2017’s Future of U.S. Warfare by Palgrave, and his first book, Explaining Wars of Choice, was published by Academica Press in February 2018.