About Greg Hartley
Two Careers. One Unique Perspective on Human Behavior.
Former US Army Interrogator. Business Executive. Author of 10 Books.
The Story Behind the Expertise
Greg Hartley combines deep expertise of how business works with equal expertise in how people work. His unique perspective comes from two parallel careers that most people never get to experience — one in the US Army as a highly trained interrogator, and one in the corporate world as a business transformation executive.
Greg was an Arabic speaking interrogator who deployed as interrogation and language support for a Special Forces 'A Team' in Operation Desert Storm. As an instructor and subject matter expert for body language and behavior, Greg was recognized by the US Army for his expertise and awarded the peer-granted Knowlton Award.
Greg trained special operations soldiers to resist interrogation and worked as an anti-terror instructor as well as a principal protection instructor. Since leaving the US Army, Greg has continued his career as a recognized body language and behavior expert appearing on podcasts, radio and television as well as in print.
Military Career
Army Interrogator
Arabic-speaking interrogator deployed with Special Forces 'A Team' during Operation Desert Storm.
Interrogation Instructor
Trained military personnel in advanced interrogation techniques and human behavior analysis.
Resistance to Interrogation Instructor
Prepared special operations soldiers to withstand interrogation under extreme conditions.
Elicitation Instructor
Taught the art of extracting information through natural conversation and behavioral cues.
Anti-Terror Instructor
Worked as a specialist instructor in counter-terrorism operations and threat assessment.
Principal Protection Instructor
Trained personnel in executive protection and threat identification.
Knowlton Award Recipient
Awarded the prestigious peer-granted Knowlton Award for excellence as a subject matter expert in body language and behavior.
Business Career
Business Transformation Executive
20+ year career leading large-scale organizational change and transformation initiatives across major corporations.
Operating Partner
Operating Partner in an Advisory and Merchant Banking Firm, applying behavioral expertise to high-stakes business decisions.
Media Appearances
Greg has appeared on every major television network and countless podcasts and radio programs as the go-to expert on body language and human behavior.
"When you need to understand what someone is really saying — not just the words — Greg Hartley is the expert networks call."
Books by Greg Hartley
Greg is the author or co-author of 10 books on body language and human behavior, making complex behavioral science accessible and actionable.
How to Spot a Liar
The definitive guide to detecting deception using body language and behavioral cues.
I Can Read You Like a Book
How to spot the messages and emotions people are really sending with their body language.
Get People to Do What You Want
Practical techniques for influencing behavior and outcomes in everyday situations.
The Body Language Handbook
A comprehensive reference for understanding and applying body language in professional and personal contexts.
Become a Human Lie Detector
Step-by-step methods for identifying deception in real-world interactions.
The Art of Body Talk
How to decode gestures, mannerisms, and body language to communicate more effectively.
Work With Greg
Greg brings his unique combination of military intelligence training and corporate experience to help organizations and individuals master the art of human behavior.
Legal Consulting
Jury selection, deposition preparation, and witness coaching for legal teams.
Speaking & Keynotes
High-impact keynotes and workshops on body language, behavior, and influence.
Interview Coaching
Prepare for high-stakes interviews by mastering congruent verbal and nonverbal messaging.
Media Training
Coaching for media personalities and executives on projecting confidence and credibility.
Ready to Unlock the Power of Body Language?
Whether you're a legal professional, business executive, or simply want to understand people better — Greg's expertise can transform the way you see and interact with the world.
Get in Touch