Dr. Greg Fitzgerald is a registered osteopath and chiropractor, as well as a three-year, full-time trained naturopath. He is the founder and principal of the "Health for Life Centre" in Sydney, Australia, and has been in practice since 1983. He and his wife Dawn run the successful seminary series and online email health program "21 Days to Transform Your Health."

He has spoken at the Australian Osteopathic Association's Annual Conference to members of his own profession. Greg has written many articles for various health publications, including the Australian Natural Health Society and the American National Health Association.