Ken Jones began his law enforcement career in March 1994 as a Corrections Deputy Sheriff Cadet. Upon completing the academy, he was assigned to the South Bay Detention Facility. In 1995, he returned to the academy to become a Deputy Sheriff. As a Deputy Sheriff, he worked at the George Bailey Detention Facility before being transferred to the North Coastal Station. While at the North Coastal Station, he held various assignments to include patrol and working within the Community Oriented Policing and Problem Solving Unit (COPPS). In August 2004, he transferred to the Vista Patrol Station as an Area Detective. Ken spent several more years within investigations as a Domestic Violence and Sexual Assault Detective, Child Abuse Detective, and as a detective in the Criminal Intelligence Detail.

Ken was promoted to the rank of Sergeant in November 2012 and transferred to the Ramona Substation. While there, he worked as a supervisor in patrol and area investigations. In April 2014, Ken transferred to Internal Affairs and later worked within the Child Abuse Unit and the SAFE Task Force as a sergeant.

After being promoted to Lieutenant in April 2018, he was assigned to the Information Led Policing and Sheriff's Analysis Driven Law Enforcement Team. In November 2018, Ken transferred to be the Lieutenant of the Ramona Substation where he oversaw its personnel and managed the daily operations. He was then assigned to be the Internal Affairs Lieutenant before promoting to Captain in March 2021. As a Captain, he was assigned to manage the Major Crimes Division which incorporates Homicide, Child Abuse, Sexual Assault, Elder/Financial Crimes, the RESPECT Project, and the Juvenile Services Group. Ken then served as the Captain of the San Marcos Sheriff's Station which also includes the Valley Center Substation.  He was promoted to Commander in March 2023 and managed the Medical Services Division, Sheriff's Transportation Unit, County Parole and Alternative Custody, and the Detention Investigations Unit. In December of 2023, he was promoted to Assistant Sheriff of the Law Enforcement Services Bureau. 

Ken graduated from Mount Carmel High School before attending college. He holds a bachelor's degree in Political Science from San Diego State University.