Since that time David has devoted his life to the research and public dissemination of Reverse Speech. He has written 18 books on the subject, both fiction and non fiction, and has conducted 1000s of media interview, radio and TV, across the world, even appearing on CNN’s The Larry King show in the United States in the 1990s where David lived and worked for 10 years. David has designed theories and training techniques, trained 100s of students during his career, and has also developed a unique therapeutic procedure which combines reverse speech and hypnosis to create powerful behavioral changes. Overcoming his childhood speech stutter, he has lectured across the world to crowds of thousands and conducted workshops for law enforcement agencies in Washington DC including the CIA and FBI.

David has been compared to Thomas Edison, Alexander Graham Bell and Nicola Tesla and his work described as being of Nobel calibre with far reaching ramifications in such fields as law enforcement, business and psychology.

He is a certified Hypnotherapist and currently attends to his therapy and corporate consulting business using reverse speech techniques. David is also an accomplished public speaker, maintaining an active international speaking and training schedule as well as a popular guest on many international radio and TV programs.

He currently resides in Adelaide, South Australia.