In private practice since 1997, Dr. David is an advanced practitioner of biomedical therapies, advocating for the Autism Research Institute philosophy since 1999. In 2005, Dr. David opened Wholistic Pediatrics & Family Care (formerly Wholistic Pediatrics), his medical practice in Tampa, Florida. In 2010, Dr. David was appointed Assistant Professor at the University of South Florida College of Nursing. In 2012, he helped develop and lead the Preconception to Infancy Portland Think Tank, from which the national P2i initiative was developed. In 2016, he launched Wholistic ReLeaf (formerly named Family Medical Cannabis Clinic) to help qualified patients use medical cannabis as a treatment option.