Administration | Tehama County Sheriff's Office


Assistant Sheriff Phil Johnston

Undersheriff Jeff Garrett

Undersheriff Garrett has worked for the Tehama County Sheriff’s Office since 1998. Prior to working for Tehama County, he worked for the Shasta County Sheriff’s Office as a Boating Safety Officer.

Past assignments have included Jail, Patrol, Civil, Boating, DARE Instructor, Marijuana Eradication Team, Narcotics Agent for the Tehama Interagency Drug Enforcement (TIDE) Task Force, and Investigations Divisions. He has been a Jail Training Officer, Field Training Officer, Patrol Sergeant and Lieutenant in charge of Operations.

Undersheriff Garrett is currently a Team Leader for the Inter – Agency SWAT team of which he has been a member since 2002. He is also a member of the Sheriff’s rescue dive team and is one of four Department Range Instructors.

Undersheriff Garrett is an active member of the California Narcotic Officers Association (CNOA) and the California Association of Tactical Officers (CATO).

Undersheriff Garrett loves to hunt and spend time with his family.


Lieutenant Derek Sherrill

Lieutenant Derek Sherrill

Lieutenant Derek Sherrill began his career in law enforcement in 2001 with an enlistment in the Air Force as a member of a Security Forces squadron. Lieutenant Sherrill underwent three separate deployments to the Middle East during operation Enduring Freedom and Iraqi Freedom; He received an honorable discharge in 2005.

Lieutenant Sherrill has been employed with the Tehama County Sheriff’s Office since 2008. He started as a correctional officer in the jail and quickly promoted to Deputy Sheriff, with a transfer to the operations division in 2009. Lieutenant Sherrill has been assigned a variety of duties which include: Patrol, S.W.A.T, Field Training Officer, Investigator, Dive Team and Range Instructor.

In 2018, Lieutenant Sherrill was promoted to Patrol Sergeant and was selected to be an Assistant Team Leader for the Tehama Interagency S.W.A.T. Team, which he has been a member of since 2009.

Lieutenant Sherrill achieved the rank of Lieutenant in 2019 and is currently assigned to the Administrative Division.

During his free time, Lieutenant Sherrill enjoys traveling, boating, fishing, and power sports.