Greg Hartley knows human behavior in and out of the trenches from interrogations to the board room.

Hartley is a former Army Interrogator, Interrogation Instructor, and Resistance to Interrogation Instructor who has written ten books on body language and behavior. Hartley made a twenty-year successful climb of the corporate ladder culminating in a role as an operating partner in a Private Equity Investment firm.

Hartley has appeared on various national and international media outlets for radio, print, internet, and TV from Der Spiegel and BBC to ABC to analyze and explain the why behind what people are saying.

He regularly contributes to network news and programs like Dr Phil. He has appeared in 4 feature length TV programs dealing with human behavior on Discover, Nat Geo, History Channel, and UKTV4.

Hartley is a founder of the popular YouTube channel “The Behavior Panel” with 900K subscribers and more than 130 million views.

He is a host of “The Behavior Panel”, the first weekly network tv show dedicated to body language and behavior and is constantly ranked in the top 4 body language experts in the world.