Henigan served as the offensive coordinator for Denton Ryan High School from 2002-2004. During that time, Denton Ryan was a state finalist in 2003 and state champion in 2002. Henigan also has coached at Allen High School and Highland Park High School. He earned a Bachelor of Arts in Political Economy in 1994 from the University of Pacific (California), where he was as a Division I scholarship quarterback. He also holds a Master of Liberal Arts in 1997 from Southern Methodist University and is certified to teach Social Studies.