John Wickum was raised in the city of Rancho Cucamonga and has been a lifelong resident of San Bernardino County. John became interested in law enforcement at a young age, joining the Sheriff’s Explorer program at Rancho Station in 1985. John began his career with the San Bernardino County Sheriff’s Department in 1991, graduating from the Frank Bland Regional Training Academy class #103.
John has worked various assignments during his career, including Central Detention Center, Foothill Detention Center, West Valley Detention Center, Victor Valley Station, Narcotics Division, Specialized Enforcement Division, Apple Valley Station, High Desert Detention Center, and most recently the Captain for the Victorville City Station.
John holds numerous certificates from the California Commission on Peace Officer Standards and Training. He attended Chaffey College and California Coast University, Irvine. He is a member of many law enforcement organizations, serving on the San Bernardino County Sheriff’s Rodeo board and he is currently the Liaison for the Sheriff’s Rangers.
Sheriff Shannon Dicus promoted John to Deputy Chief in March 2024. John is currently assigned to the Detention and Corrections Support Bureau and the Court Services Division.
