Greg Hartley is a former Army interrogator, interrogation instructor, and resistance to interrogation instructor who has written 10 books on body language and behavior. He spends most of his time these days working on Wall Street and in corporate America. Greg spent most of his 20 years in the Army wandering around the country living in multiple places and interrogating prisoners. He deployed during the first Gulf War with a special forces team and spent time there using his interrogation skills. 

Post-military, Greg has been an executive in operations, advised private equity firms, and written books and training courses in body language and behavior.