He considers himself fortunate to have trained under and practiced neurosurgery with Dr. Julius Goodman, an internationally renowned educator, personal mentor, and giant in the neurosurgical field. He was instrumental in organizing the vascular neurosurgical division of the then Indianapolis Neurosurgical Group, which was nationally recognized for its state-of-the-art expertise.
Dr. Horner has a vast experience in the management of mild, moderate, and severe traumatic brain injuries.
He now limits his neurosurgical practice to concussion management of athletes from grade school to professional athletes. He is the neurosurgical consultant for the Indianapolis Colts and Indiana University football team and stands on the sidelines at every game.
Dr. Horner is also active in the education of athletes, parents, coaches, athletic trainers, and others in the diagnosis and management of concussion. Dr. Horner and his wife Jane have two sons, one daughter, and five grandchildren. A devout member of his church, he also enjoys taking mission trips to volunteer his time and medical expertise in underdeveloped countries especially Kenya, East Africa.