Reserve Deputy Sheriff

Contra Costa County Deputy Sheriff Reserves
Are Sworn Reserve Peace Officers
As a Reserve Deputy you can...
Give Back to Communities Part-Time
Chose One of Three Levels of Training
Have a Wide Variety of Assignments



The Position

Deputy Sheriff Reserves are citizen-volunteers who give their time to increase the safety and security of their community. They are professionals in both their full-time jobs and their part-time career with the Office of the Sheriff. Reserve Deputies take great pride in the organization and the services that they provide.

Deputy Sheriff Reserves are California Sworn Reserve Peace Officers that are trained at or above the state POST Standards.  If you are interested in volunteering your time to protect and serve your community, we want to talk to you.  We are hiring Level III, II, and I Reserves.

Training Level Information


Respond to Service Calls

Reserves support all types of law enforcement service calls with full time deputies.  Whether it is a false alarm, a dog left in a hot car, or a serious crime, you will be an integral part of handling the call.

Transport Arrestees

Contra Costa County covers over 715 square miles and has 1.1 million residents.  As a Reserve Deputy, you will transport arrestees from all over the county to our detention facilities, allowing full time deputies to stay in their communities.

Save Lives

Each year our Reserves respond to calls where someone’s life is at risk. As a Reserve, you may help save someone with a medical emergency or those injured in a traffic accident, as well as help find lost loved ones that are at risk.

Assist With Emergencies

As a Reserve, you will be on call 24/7/365 to assist with emergency situations.  We ask that you respond to as many as you can, but understand that you have paid employment and other commitments elsewhere. You will help with a wide variety of crime scenes and special details.

Give Out Hundreds of Stickers

Reserves support over 60 community events per year.  As a Reserve, you can: 

  • Keep events secure
  • Provide food and gifts during the holidays
  • Reunite lost parents with their children
  • Help people at the County Fair
  • Support organized races on Mt. Diablo
  • Give out 100’s of stickers

Continuously Grow Your Skills

Reserves train continuously to maintain and grow their skills.

We also have limited specialized patrol opportunities including bicycle, motorcycle, off-road, helicopter and marine patrol.

Minimum Qualifications


  • No felony convictions
  • No criminal or improper personal conduct
  • Clean driving record and valid California license
  • Good moral character


  • Be at least 21 years old
  • Meet P.O.S.T. physical and psychological standards
  • Have an attitude that supports the Sheriff’s objectives


  • GED or High School Diploma
  • P.O.S.T. Modular or Basic Academy Certificate

Attend Our Orientation

Attend one of our orientation sessions to learn more about our program and see if we are a good fit for you. Complete an initial interview to determine whether you are the right candidate for us.

Contact us for times and locations.

Complete a P.O.S.T Academy

Earn a California Peace Officer Standards and Testing Basic or Modular Academy certificate.  More information on Academy schedules and locations can be found here:

Academy Information

Application Process

Reserves must pass the same background check as our full-time deputies.  The process includes:

  • Agility test (easier test for Levels III & II)
  • Writing test and oral interview
  • Polygraph test
  • Detailed background check
  • Physical and psychological exams
  • Final Executive Interview



If you are interested in a rewarding part-time career in the fast-paced world of law enforcement, you are encouraged to apply as a Deputy Sheriff Reserve.

For further information or questions, please contact:

Reserve Deputy Program
Emergency Services Division
Contra Costa County Office of the Sheriff
50 Glacier Drive
Martinez, CA 94553
(925) 646-4461