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Background Investigator (Part-time)

Sheriff's Office

Recruitment #0521-RP0120-TM


This part-time recruitment is being given to fill vacancies within the San Joaquin County Sheriff's Office and to establish a referral list which may be used to fill future part-time opportunities.

Pre-Employment Drug Screening and Background:  Potential new hires into this classification are required to successfully pass a pre-employment drug screen and a background investigation as a condition of employment. Final appointment cannot be made unless the eligible has passed the drug screen and successfully completed the background process.  The County pays for the initial drug screen.

Resumes will not be accepted in lieu of an application. A completed application must be postmarked or received online by the final filing deadline.

NOTE: All correspondences relating to this recruitment will be delivered via e-mail. The e-mail account used will be the one provided on your employment application during time of submittal. Please be sure to check your e-mail often for updates. If you do not have an e-mail account on file, Human Resources will send you correspondences via US Mail.


1.     Conducts thorough and complete background investigations according to department policies, applicable laws, and procedural requirements; reviews information for completeness; identifies and requests additional needed information; obtains proper information release documents.


2.     Researches, obtains, and reviews applicant data from various databases and information systems to verify information and/or check for inconsistencies related to applicant information.


3.     Gathers, verifies, and analyzes personal, professional, credit/financial, and educational documents; contacts other agencies, governments, and professional organizations as needed to obtain and verify information.


4.     Prepares letters, reports and written summary of findings; analyzes investigation results and draws logical and objective conclusions; makes recommendations regarding approval or denial of application.


5.     Responds to requests for information; assists other agencies with appropriate requests to provide information regarding applicant background investigations; answers applicant questions; refers requests or questions to managers as appropriate.


6.     Attends training sessions, seminars and conferences; trains and advises others as required.


7.     May be required to travel to gather and verify information.


Experience:  Either:  1) Two years performing law enforcement investigative work for a government or private investigative agency; or 2) four years as a peace officer in a government law enforcement agency.


Substitution:  Completion of a Peace Officers Standards and Training (POST) approved Background Investigator course may substitute for six months of the above-required experience.


License:  Possession of a valid California driver’s license.

Note:  Supplemental application must be submitted with employment application.


Principles and practices of law enforcement-related investigation and research; relevant federal, state and local laws, codes, and ordinances related to the legal requirements of background investigations; how to access data in law enforcement electronic information systems; principles of identification; interviewing, negotiation, and conflict management methods and techniques; principles and procedures of recordkeeping and reporting; statistical analysis and data collection; basic computer and modern office automation technology and computer software programs relevant to department operations.


Effectively research and evaluate information and prepare sound recommendations based on research and analysis; demonstrate sensitivity of diverse cultures and individuals; work within stringent deadlines; organize, prioritize and perform multiple tasks to complete work; work independently; read, comprehend and interpret complex written materials; perform detailed work with accuracy; exercise good judgment in safeguarding confidential and sensitive information; exercise diplomacy when dealing with people in sensitive situations; operate computers and related software; establish and maintain effective working relationships with applicants, agencies, employees, and the general public; communicate effectively, both orally and in writing.


Mobility – frequent operation of a data entry device; repetitive motion; sitting, standing, walking for extended periods of time; driving; occasional pushing, pulling, bending, squatting, climbing:   Lifting - frequently 5 pounds or less; occasional 5 to 30 pounds;  Visual - constant good overall vision and reading/close-up work; frequent color perception and use eye/hand coordination; occasional use of depth perception and peripheral vision;  Dexterity-  occasional reaching; grasping; frequent repetitive motion; writing; Hearing/Talking- frequent hearing of normal speech, hearing/talking on the telephone, talking in person;  Emotional/Psychological – constant decision making, concentration, and public contact; public speaking; dealing with emergency situations; Special Requirements –may require working overtime, weekends and nights; working alone;  Environmental – occasional exposure to varied weather conditions.

Selection Procedures

Applicants for part-time and temporary recruitments who meet the minimum qualifications are either referred to the hiring department for further selection or they may be required to take a written examination.  If a written examination is given, the top candidates may be referred to the hiring department for further selection.

Testing Accommodation:  Candidates who require testing accommodation under the Americans with Disabilities Act (ADA) must call Human Resources Division at (209) 468-3370 prior to the examination date. 

Physical Exam:  Some classifications require physical examinations.  Final appointment cannot be made until the eligible has passed the physical examination.  The County pays for physical examinations administered in its medical facilities.

Pre-employment Drug Screening Exam:  Some classifications require a new employee successfully pass a pre-employment drug screen as a condition of employment.  Final appointment cannot be made until the eligible has passed the drug screen.  The County pays for the initial drug screen.


Employment of Relatives: Applicants who are relatives of employees in a department within the 3rd degree of relationship, (parent, child, grandparent, grandchild or sibling) either by blood or marriage, may not be appointed, promoted, transferred into or within the department when:

  • They are related to the Appointing Authority, or

  • The employment would result in one of them supervising the work of the other

Department Heads may establish additional limitations on the hiring of relatives by departmental rule.

Proof of Eligibility:  If you are offered a job, you will be required to provide proof of U.S. citizenship or other documents that establish your eligibility to be employed in the U.S.


Apply Online:

By mail or in person:  

San Joaquin County Human Resources

44 N. San Joaquin Street Suite 330

Stockton, CA 95202                                  


Office hours:               
Monday – Friday 8:00 am to 5:00 pm; excluding holidays.

Phone:  (209) 468-3370 


Job Line:

For current employment opportunities please call our 24-hour job line at (209) 468-3377. 

When a final filing date is indicated, applications must be filed with the Human Resources Division before 5:00 p.m. or postmarked by the final filing date. Resumes will not be accepted in lieu of an application. Applications sent through county inter-office mail, which are not received by the final filing date, will not be accepted. (The County assumes no responsibility for mailed applications which are not received by the Human Resources Division).  

San Joaquin County Substance Abuse Policy: San Joaquin County has adopted a Substance Abuse Policy in compliance with the Federal Drug Free Workplace Act of 1988. This policy is enforced by all San Joaquin County Departments and applies to all San Joaquin County employees.

Equal Opportunity Employer:  San Joaquin County is an Equal Employment Opportunity (EEO) Employer and is committed to providing equal employment to all without regard to age, ancestry, color, creed, marital status, medical condition, national origin, physical or mental disability, political affiliation or belief, pregnancy, race, religion, sex, or sexual orientation.  For more information go to

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San Joaquin County
Human Resources Division  Stockton, CA 95202
E-mail | Phone: (209) 468-3370 | 8am - 5pm M-F | Powered by JobAps