
Posting number: 3KTB-2026A
Department: Library
Job classification: Library Assistant - Advanced Level - Deep Class
Posting type: Open
Categories: Clerical & Data Entry, Library
Bargaining Unit: Local 1 - Library Unit
Contra Costa County is recruiting to fill one (1) permanent part-time Library Assistant Advanced Level position within the Library Department. Library Assistants are assigned to either the Library Department or the Sheriff's Office. The eligible list generated by this recruitment may also be used to fill full-time, part-time or permanent-intermittent vacancies as they occur.
Why join the Contra Costa County Library?
Contra Costa County’s Library Department is seeking qualified candidates to fill a vacancy for the Library Assistant – Advanced Level classification.
The Contra Costa County Library is a dynamic system of nearly 400 dedicated employees, including multilingual staff who make up 10% of the workforce. Together, they serve 26 diverse communities across the county.
Each year, the Library welcomes more than 2.4 million visitors and circulates approximately 4.8 million items.
The Library’s Strategic Plan guides its commitment to fostering personal and community engagement through literacy and reading. This plan shapes the Library’s priorities, ensuring it delivers essential services and resources in safe and welcoming spaces. The Library is deeply committed to equity, diversity, and inclusion and is actively working to advance anti-racist practices within the organization.
As a County Department, the Library works to ensure every resident can learn, grow, and thrive in strong, inclusive communities.
A few challenges you might face in this job:
To read the complete job description, please visit the website, www.cccounty.us/hr. The eligible list established from this recruitment may remain in effect for six months.
Education: Possession of a Bachelor’s degree from an accredited college or university.
Experience: two (2) years of full-time or its equivalent of para-professional experience in a public library which must have included readers advisory, information services and bibliographic searching AND two (2) years of full time or its equivalent experience in a customer oriented environment.
Substitution For Education: Two (2) years of full-time or its equivalent of para-professional experience in a public library which must have included readers advisory and information services and bibliographic searching AND
(1) possession of 60 semester or 90 quarter unit from an accredited college or university, OR
(2) a Certificate of Library Technology from an accredited college or university. OR
(3) two (2) years of full-time or its equivalent of para-professional experience in a public library which must have included readers advisory and information services and bibliographic searching.
After you receive a conditional job offer, you will be fingerprinted, and your fingerprints will be sent to the California Department of Justice (DOJ) and the Federal Bureau of Investigation (FBI). The resulting report of your conviction history (if any) will be used to determine whether the nature of your conviction conflicts with the specific duties and responsibilities of the job for which you have received a conditional job offer. If a conflict exists, you will be asked to present any evidence of rehabilitation that may mitigate the conflict, except when federal or state regulations bar employment in specific circumstances. Having a conviction history does not automatically preclude you from a job with Contra Costa County. If you accept a conditional job offer, the Human Resources department will contact you to schedule a fingerprinting appointment.
All Contra Costa County employees are designated Disaster Service Workers through state and local law. Employment with the County requires the affirmation of a loyalty oath to this effect. Employees are required to complete all Disaster Service Worker-related training as assigned, and to return to work as ordered in the event of an emergency.
It is the policy of Contra Costa County to consider all applicants for employment without regard to race, color, religion, sex, national origin, ethnicity, age, disability, sexual orientation, gender, gender identify, gender expression, marital status, ancestry, medical condition, genetic information, military or veteran status, or other protected category under the law.
Contra Costa County is committed to providing equal access and opportunity to qualified individuals with disabilities in its employment practices. If you believe you may anticipate needing reasonable accommodation, please visit our job seeker resources page at: Special Testing Accommodations | Contra Costa County, CA Official Website.

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