Shannon Moore was born in Huntsville, Alabama. He is a graduate of Grissom High School and received his undergraduate degree from the University of Alabama in Huntsville.

He went on to get his juris doctorate from the University of Alabama School of Law. Upon graduation from law school in 1998, he went on to found a law firm with a fellow law school graduate. He has been in the private practice of law since that time.

His practice focuses on criminal law, family law, and personal injury. Over the years, Shannon has represented hundreds of individuals and has been involved with both bench trials and jury trials. In addition, he served as the prosecutor for the City of Madison for several years.

Shannon is a past president of the Madison County Young Lawyers. He is a member of the Madison County Bar Association, the Alabama Bar Association, and the Alabama Criminal Defense Lawyer's Association.