Peter H.B. Lejeune


Part-time Faculty


Office Phone: 703-992-4010

Mr. Lejeune is the senior intelligence liaison and emerging threats advisor to the Chief Medical Officer of The Department of Homeland Security, Office of Health Security. Previously he spent more than 40 years working with the US Department of Defense, the Department of Homeland Security and its precursors, as well as holding senior positions in the Defense Contracting sector, the financial sector, and state and local governments.

His expertise spans technology, intelligence, the US government's inter-agency, state and local governments, and international activities. He has served on several Inter-agency advisory groups and panels addressing the threat of the terrorist use of WMD and, in particular, the use of intelligence and technology to assess and mitigate these threats. In addition, he has performed counter-terrorist threat and target assessments both in the United States and abroad. He has worked on countering recruiting efforts and applying influence operations.

He worked as Director of Emergency Planning and Response, Mayor’s Office, City of New York under Mayor Ed Koch, and as an adviser to the Police of Puerto Rico and to the government of Puerto Rico. Served as a Member of the Threat Reduction Advisory Committee (TRAC), at the US Defense Threat Reduction Agency. Reviewed the effects of the 9-11 attack on the banking system. Participated in creating the Harvard Kennedy School of Government's "The Innovations in American Government Awards" program and served as the lead evaluator for this program, performing annual reviews of applicants for the award.



International Counter Proliferation, Homeland Security, Crisis Management, and Emergency Response

Influence Operations

DFLT IAFF 6169 10 - Homeland Security

  • Reverse Engineering Extremist Narratives in a Big Data Environment—Targeting the Human Domain in Real-time, 2016
  • Induced Negative Subliminal Reactions to Radical Media and Propaganda: Countering Recruiting Efforts in a Congested Media Environment Peter Lejeune with Joel L. Davis, Gregory Seese, Rafael E. Linera Rivera, Small Wars Journal Article | Aug 7 2016
  • Influencing Behavior in Mid-21st Century Asymmetric and Irregular Warfare: Peter Lejeune Gregory Seese, Rafael E. Linera Rivera Small Wars Journal Article | Jul 29 2016
  • Chaired the Chemical Biological Medical Treatment Symposium (a.k.a. CBRN Science and Consequence Management) in Spiez, Switzerland, 2012