Retired U.S. Army Lt. Col.; Founder of Killology; Leading Authority on Combat Psychology; Author of "On Killing"

Mascoutah, IL, USA
Live Event: $10,000 - $20,000 Virtual Event: $5,000 - $10,000 More Fee Info

Lt. Col. Dave Grossman Biography

Lt. Col. Dave Grossman is a retired United States Army officer and a recognized authority in the psychology of lethal force and human aggression. Grossman served as an Airborne Ranger infantry officer with more than 23 years of military experience, including assignments as a West Point psychology professor and Professor of Military Science. He founded the field of killology, a scientific discipline examining the physiological and psychological effects of killing in war and society, the root causes of violent crime, and pathways to healing for survivors of violence.

Grossman is known for his work, "On Killing: The Psychological Cost of Learning to Kill in War and Society," which has sold more than half a million copies worldwide and has been translated into several languages. The book was nominated for a Pulitzer Prize and is required reading at the FBI Academy, the U.S. Marine Corps Commandant's Required Reading List, and numerous military and law enforcement academies globally. He has co-authored a New York Times bestselling book with Glenn Beck and published additional works, including "On Combat" as well as fiction and children's books. His research has been cited by U.S. presidents in national addresses, and he has testified before the U.S. Senate, Congress, and various state legislatures.

After retiring from active duty, Grossman established the Killology Research Group and serves as director of Grossman On Truth, LLC. He conducts seminars and training for military and law enforcement organizations worldwide, delivering presentations to law enforcement professionals, educators, and military personnel across all 50 states and in numerous foreign nations. Grossman has served as an expert witness in state and federal court cases, including the prosecution of Timothy McVeigh, and has provided consultation and training following major violent incidents, including school massacres.

Grossman's work in combat psychology and violence prevention has earned him recognition as a Life Diplomate by the American Board for Certification in Homeland Security and a Life Member of the American College of Forensic Examiners Institute. He has presented papers before major professional organizations, including the American Medical Association, American Psychiatric Association, American Psychological Association, and American Academy of Pediatrics, and has lectured at more than 100 colleges and universities worldwide. His research continues to influence how military personnel, law enforcement officers, and civilians understand the psychological dimensions of lethal force and violence prevention.

BOOK Lt. Col. Dave Grossman

Speaker profile last updated by AAE Talent Team on 04/07/2026.

Lt. Col. Dave Grossman Speaking Topics

  • "Protecting the Workplace from Violence: Creating a Safe Place"

  • "The Application of Basic Psychological Therapeutic Processes for Mass Casualties Resulting from Violent Crime"

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Lt. Col. Dave Grossman Videos

Building The Bulletproof Mind with Lt. Col Dave Grossman | S5 E13

Building The Bulletproof Mind with Lt. Col Dave Grossman | S5 E13

Tune in for a compelling episode featuring Lt. Col. Dave Grossman a distinguished former Army Ranger and leading expert on combat.

The Bulletproof Mindset: Insights from Lt. Col. Dave Grossman

The Bulletproof Mindset: Insights from Lt. Col. Dave Grossman

We're joined by Lt. Col. Dave Grossman a retired U.S. Army Ranger psychologist and one of the world's leading experts and authors.

On Trauma: A Conversation with Lt. Col. Dave Grossman

On Trauma: A Conversation with Lt. Col. Dave Grossman

welcomes back Lt. Col. Dave Grossman a retired Army Ranger psychologist and world-renowned author of On Killing and On Combat.

  • How do I book Lt. Col. Dave Grossman to speak at my event?

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  • What topics does Lt. Col. Dave Grossman speak about?

    Lt. Col. Dave Grossman is a keynote speaker and industry expert whose speaking topics include Author, Education, Education Reform, Government, Mental Health, Military, Mindfulness, Mindset, Motivational, Personal Growth, Security & Defense, Social Activism
  • Where does Lt. Col. Dave Grossman travel from?

    Lt. Col. Dave Grossman generally travels from Mascoutah, IL, USA, but can be booked for private corporate events, personal appearances, keynote speeches, or other performances. For more details, please contact an AAE Booking agent.
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Lt. Col. Dave Grossman is a keynote speaker and industry expert who speaks on a wide range of topics such as "Protecting the Workplace from Violence: Creating a Safe Place", "The Application of Basic Psychological Therapeutic Processes for Mass Casualties Resulting from Violent Crime", "Lessons from Jonesboro, Littleton, and Vietnam: How Kids are Learning to Kill and Learning to Like It", "The Bullet Proof Mind" and "Safe Schools and Healthy Students". The estimated speaking fee range to book Lt. Col. Dave Grossman for your event is $10,000 - $20,000. Lt. Col. Dave Grossman generally travels from Mascoutah, IL, USA and can be booked for (private) corporate events, personal appearances, keynote speeches, or other performances. Similar motivational celebrity speakers are Tom Voss, Silouan Green, Ed Hiner, Dr. Christian Conte and Oz Sanchez. Contact All American Speakers for ratings, reviews, videos and information on scheduling Lt. Col. Dave Grossman for an upcoming live or virtual event.

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