Leonard Wayne Hennigan graduated from NSU in 1954 with a degree in Mathematics and Physical Education. He completed his master’s in Education in 1960 and later completed 30-plus courses at Northwestern, LSU and Peabody College in 1964. He earned additional counselor certification at NSU in 1966. After completing ROTC training in 1954, he was commissioned as 2nd Lt. Active duty and was assigned to the 1st Armored Division in Fort Hood, Texas. He served in several units and graduated Basic Artillery, Advanced Artillery and Command and General Staff College in 1967. He retired in 1975 with the rank of Lt. Colonel.

Hennigan began his teaching career at Mansfield High School in 1956, where he served as head basketball coach and assistant football coach. He later taught algebra at Oak Terrace Junior High in Caddo Parish and was a counselor at Woodlawn High School before returning to Oak Terrace as Principal from 1966-67. He was Assistant Principal at Captain Shreve High School from 1967-70 and was Principal at Valencia Junior High and served as Assistant Principal at Southwood High School in Shreveport from 1970-82. He was Principal at Southwood from 1982 until his retirement in 1988. Hennigan and his wife, Lottie, reside in Shreveport