Guillen began his involvement as a volunteer at the Goleta Boys Club from 1960-70. He was a Goleta Valley South Little League umpire from 1970-75. Joining the Central Coast Officials Association in 1971, Guillen served 30 years as a high school official in football, basketball and baseball. He worked nine CIF Finals in Southern Section football and numerous league championship games.
Guillen was awarded the Dick Olmstead Award as an outstanding Channel Coast football official in 1987 and earned the Burt Davis-Cal Houston award for an outstanding 30 years of service to the officials association. During his career, Guillen also worked as a community college football official.
In addition to officiating support, Guillen also volunteered for lunch duty at St. Raphael School and helped hand out food to the needy at the Goleta Boys Club. Guillen attended Chicago Vocational High School from 1954-56 playing basketball and football and played football for SBCC in 1957.
Guillen is survived by his wife, Barbara, and children Karen, Lori and Kelly.