Di Yorio (right in photo), who was previously serving as Assistant Sheriff, will now serve as the Department's Chief of Staff and second-in-command. The Riverside County Sheriff's Department is one of the largest sheriff's operations in California, with over 4,000 employees serving over 7,300 square miles. His appointment became effective Aug. 7.
The appointment of Undersheriff Di Yorio fills a vacancy created by the retirement of Colleen Walker, who served in that capacity the last four years.
Di Yorio joined the Riverside County Sheriff’s Department in 1980 after completion of the Southern California Peace Officer’s Basic Training Academy. As a Deputy Sheriff and Investigator, he worked at the Lake Elsinore Station and served five years on the Department’s Emergency Response Team (SWAT). As a Sergeant, Di Yorio worked the Riverside Jail and the Moreno Valley Police Department. In 1995, he was promoted to the rank of Sheriff’s Lieutenant and worked assignments at the Moreno Valley Police Department and the Southwest Detention Center.
Di Yorio also served as Chief of Police in Moreno Valley before being promoted to Assistant Sheriff in 2008. He is a United States Army veteran and he and his family have lived in the Riverside area since 1962. He earned his Bachelor of Science degree in Criminal Justice from Cal State San Bernardino.