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  3. Administrative Assistant

Onsite Administrative Assistant jobs in California, USA

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Administrative Assistant Jobs in California — On-Site Opportunities Await

Companies across California are actively seeking organized professionals to fill open roles, and 500+ on-site positions are currently available in this growing field. Employers need reliable support staff who can manage schedules, communications, and office logistics with precision. As businesses expand throughout the state, administrative assistant on-site jobs continue to grow in both volume and importance.

The most sought-after candidates demonstrate strong organizational skills, attention to detail, and proficiency with office software such as Microsoft Office and scheduling tools. Clear written and verbal communication remains essential, as these professionals often serve as the first point of contact for clients and partners. Employers also look for adaptability, multitasking ability, and a proactive approach to problem-solving, making these qualities central to any successful application for administrative assistant positions.

On-site roles in California typically involve close collaboration with management teams, handling confidential documents, and coordinating office activities in person. This hands-on work style supports faster communication and stronger teamwork, which many employers prefer for this type of support role. With the state's robust economy and diverse industries, demand for administrative assistant vacancies remains steady, offering stable opportunities for career growth.

If you're ready to bring your organizational talents to a thriving workplace, now is the perfect time to explore available roles. Global Work AI connects motivated professionals with employers eager to hire an administrative assistant across California. Discover your next opportunity and take the next step in your career today.

Frequently Asked
Questions

Everything you need to know about
finding your next role
  • What is the average salary for an administrative assistant in California?

    In California, pay for an administrative assistant commonly falls around the low-to-mid $20s per hour, with annual earnings often landing near $45,000 to $55,000 depending on employer size, industry, and location. Larger metro areas such as Los Angeles, San Francisco, San Diego, and Sacramento may offer higher rates because of local labor costs. Benefits, overtime eligibility, and specialized software skills can also influence total compensation. When reviewing current openings, compare pay with similar office support roles to judge whether the package is competitive.
  • What skills and qualifications do I need for an administrative assistant job?

    Strong organization, clear communication, and solid time management are core expectations for an administrative assistant in California. Employers usually look for comfort with Microsoft Office or Google Workspace, calendar coordination, data entry, phone etiquette, and accurate recordkeeping. A high school diploma is often the minimum, while some offices prefer an associate degree or prior clerical training. Since many teams want someone who can handle multiple priorities in a busy office, it helps to show attention to detail, discretion, and a dependable work style when comparing listings.
  • What are the main responsibilities of an administrative assistant in an office setting?

    Day-to-day duties usually center on keeping the office running smoothly. An administrative assistant may answer calls, schedule meetings, manage files, prepare documents, process mail, support managers, and track supplies or basic records. In California offices, the role can also include coordinating visitors, updating spreadsheets, and helping with internal communication. Depending on the company, you may support HR, finance, or sales teams as well. Reviewing individual job ads is the best way to see how much variety the role includes at a specific employer.
  • Is previous office experience required for an administrative assistant role in California?

    Not always. Many California employers are open to entry-level candidates if they show transferable strengths such as customer service, multitasking, strong written communication, and basic computer confidence. Still, prior office experience can be an advantage because it signals familiarity with scheduling, filing systems, and workplace routines. Some organizations also value internship work, volunteer coordination, or receptionist duties. If you are newer to administrative work, look for roles that mention training, junior support, or similar expectations to find a better fit.
  • How does the hiring process usually work for an administrative assistant position?

    The process often starts with an application and resume screening, followed by a phone or video interview, then one or more in-person conversations for on-site roles. In California, employers may ask about software skills, calendar handling, customer interaction, and your approach to confidential information. Some companies include skills testing for typing, spreadsheets, or email drafting. References and background checks are also common, especially in regulated industries. After reviewing the job description, tailor your examples to the office tasks the employer highlights most.
  • What does a typical day look like for an on-site administrative assistant?

    Most days begin with checking messages, reviewing the calendar, and preparing for meetings or deadlines. From there, an on-site administrative assistant may greet guests, route calls, update files, handle mail, restock supplies, and support team members with forms or scheduling changes. In California workplaces, fast-paced environments often mean priorities can shift during the day, so flexibility matters. The routine is usually a mix of planned tasks and quick requests from managers or staff, which makes strong organization especially useful. Looking at current postings can help you see how structured the day may be.
  • Are there opportunities for career growth from an administrative assistant role?

    Yes. Many professionals use an administrative assistant position as a launch point into office management, executive support, HR coordination, operations, or project administration. In California, larger employers and growing companies may offer paths toward senior administrative assistant, office coordinator, or team support specialist roles. Building skills in scheduling, reporting, and software tools can make that progression easier. Some people also move into specialized tracks such as legal, medical, or finance administration. If advancement matters to you, compare openings that mention training, promotion paths, or expanded responsibilities.

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500+ jobs found

  • FAMILIES TOGETHER OF ORANGE COUNTY

    FAMILIES TOGETHER OF ORANGE COUNTY

    Today

    Administrative & personal assistant

    Description Salary: $28 to $30 an hour, depending on experience Location: Tustin, CA Schedule: Monday to Friday 9am to 6pm FTOC is seeking a dynamic and highly organized Administrative Assistant that...

    onsite, Tustin, CA, United States
    $56k – $60k/yrFull TimeJunior (<2 years)
  • RHF (Retirement Housing Foundation)

    RHF (Retirement Housing Foundation)

    Today

    Office assistant

    JOIN OUR MISSION-DRIVEN TEAM Are you organized, reliable, and detail-oriented with experience in administrative support? RHF is seeking an Office Assistant to support the Property Manager and site...

    onsite, Lancaster, CA, United States
    $42k – $44k/yrFull TimeJunior (<2 years)
  • Associa

    Associa

    Today

    Administrative assistant - commercial department

    Administrative Assistant – Commercial Division Reports to: Vice President – Commercial Division Job Summary The Administrative Assistant provides dedicated administrative and operational support to...

    onsite, Temecula, CA, United States
    $46k – $50k/yrFull TimeJunior (<2 years)
  • Matthews Real Estate Investment Services, Inc

    Matthews Real Estate Investment Services, Inc

    Today

    Administrative assistant, part-time

    About Matthews™ The Administrative Assistant will play a key role in supporting the office's administrative functions and assisting the leadership team. This role involves handling tasks such as data...

    onsite, Encino, CA, United States
    $48k – $54k/yrPart TimeJunior (<2 years)
  • Synergy Health AST LLC

    Synergy Health AST LLC

    a day ago

    Administrative assistant

    Position Summary Assists management in maintaining sales records, files, contracts, payroll (as applicable), purchase orders, accounts payable / receivable (as applicable) and special reports. Serves...

    onsite, Petaluma, CA, United States
    $46k – $56k/yrFull TimeJunior (<2 years)
  • Neighborhood Healthcare

    Neighborhood Healthcare

    a day ago

    Administrative assistant i (temporary)

    About Us Community health is about more than just vaccines and checkups. It’s about giving people the resources they need to live their best lives. At Neighborhood, this is our vision. A community...

    onsite, Escondido, CA, United States
    $46k – $65k/yrFull TimeJunior (<2 years)
  • SIGMA

    SIGMA

    a day ago

    Administrative assistant

    Position Summary: Process inventory and company funds, apply cash to invoices and open accounts receivable balances, prepare invoices, and issue customer statements. Support Office Administrators...

    onsite, Vernon, CA, United States
    Full TimeNo Skills
  • Crestwood Behavioral Health

    Crestwood Behavioral Health

    a day ago

    Administrative assistant

    Are you looking for a meaningful role in behavioral health and have the desire to work with an organization that puts people first? If you have a passion for helping others along their recovery...

    onsite, Stockton, CA, United States
    $46k – $50k/yrFull TimeJunior (<2 years)
  • UniversalAGI

    UniversalAGI

    2 days ago

    Executive assistant

    Executive Assistant to the Founder & CEO Location: Onsite in San Francisco Compensation: Competitive Salary + Equity Who We Are Engineering simulation is one of the last major categories of software...

    onsite, San Francisco, CA, United States
    Full TimeMiddle (2-4 years)
  • R

    RP & JL LLC

    3 days ago

    Assistant administrator

    Benefits: Employee discounts Health insurance Paid time off 401(k) matching Dental insurance Vision insurance About the Role: RP & JL LLC is looking for a motivated and organized Assistant...

    onsite, National City, CA, United States
    Full TimeNo Skills
  • INNOVATIVE INTEGRATED HEALTH

    INNOVATIVE INTEGRATED HEALTH

    5 days ago

    Administrative assistant

    Job Details Level: Entry Job Location: Fresno - Fresno, CA Position Type: Full Time Salary Range: $17.00 - $21.00 Hourly Job Shift: Day Job Category: Admin - Clerical Who We Are PACE by IIH is...

    onsite, Fresno, CA, United States
    $34k – $42k/yrFull TimeJunior (<2 years)
  • Associated Asset Management (AAM)

    Associated Asset Management (AAM)

    6 days ago

    Onsite administrative assistant

    Join the Team at Rancho Monserate HOA! Nestled just east of Bonsall and south of Fallbrook, California, Rancho Monserate Country Club HOA is a vibrant, resident-owned 55+ community where neighbors...

    onsite, Bonsall, CA, United States
    Part TimeNo Skills
  • Quinn Company

    Quinn Company

    6 days ago

    Service administrative assistant

    Overview Quinn Company, your local Caterpillar store, is hiring a Service Administrative Assistant in Bakersfield, California. Quinn Company is a Caterpillar dealership founded in 1919. The company...

    onsite, Bakersfield, CA, United States
    $36k – $52k/yrFull TimeJunior (<2 years)
  • Kay and Associates, Inc.

    Kay and Associates, Inc.

    7 days ago

    Administrative assistant

    JOB SUMMARY: We are seeking an Administrative Assistant for our Ground Support Equipment/Special Purpose Maintenance contract at the NASA Armstrong Flight Research Center. The ideal candidate will...

    onsite, Edwards, CA, United States
    Full TimeSenior (5+ years)
  • DHL (Supply Chain)

    DHL (Supply Chain)

    7 days ago

    Administrative assistant ii

    Role Purpose: Provide administrative and clerical support to management including the management of personnel records. Work under general supervision of the General Manager while providing personal...

    onsite, Tracy, CA, United States
    Full TimeJunior (<2 years)
  • Ignite Human Capital

    Ignite Human Capital

    7 days ago

    Administrative assistant (temporary)

    Administrative Assistant (Temporary) Location: Escondido, CA 92025 (On-site) Schedule: Full-time, Monday–Friday, 8:00 a.m.–5:00 p.m. (one-hour lunch) Duration: 3-month assignment, estimated end date...

    onsite, Escondido, CA, United States
    $44k – $65k/yrFull TimeJunior (<2 years)
  • The Gowan Co.

    The Gowan Co.

    7 days ago

    Administrative assistant

    Job Summary Front Office Receptionist is responsible for managing the front desk and providing administrative support to ensure efficient operation of the office. Essential Duties and...

    onsite, Chualar, CA, United States
    Full TimeNo Skills
  • The Gersh Agency

    The Gersh Agency

    8 days ago

    Assistant to the president

    About Gersh Gersh is a leading global entertainment and sports agency, representing a diverse roster of clients across film, television, sports, theater, comedy, branding, publishing, and digital...

    onsite, Beverly Hills, CA, United States
    Full TimeJunior (<2 years)
  • Allana Buick & Bers

    Allana Buick & Bers

    8 days ago

    Administrative assistant

    Allana Buick & Bers is looking for an Administrative Assistant who will provide administrative support for our management staff and support our Forensic team in Palo Alto, CA to coordinate...

    onsite, Palo Alto, CA, United States
    Full TimeJunior (<2 years)
  • San Manuel Band of Mission Indians

    San Manuel Band of Mission Indians

    8 days ago

    Administrative assistant, facilities

    Under the guidance of the Director, Facilities, the Administrative Assistant - Facilities provides administrative support to the Facilities and Environmental Services (EVS) Departments and assists...

    onsite, Highland, CA, United States
    Full TimeJunior (<2 years)
  • Easterseals Southern California

    Easterseals Southern California

    8 days ago

    Administrative assistant

    Easterseals Southern California transforms lives every day. For over a century, Easterseals has championed inclusion and independence—delivering essential services like early childhood programs,...

    onsite, Lancaster, CA, United States
    $45k/yrFull TimeJunior (<2 years)
  • SAIC

    SAIC

    9 days ago

    Administrative assistant iv

    SAIC is seeking a highly professional and detail-oriented Administrative Assistant to support daily business operations and provide administrative support to leadership and team members. The ideal...

    onsite, Santa Maria, CA, United States
    Full TimeMiddle (2-4 years)
  • HUB International

    HUB International

    9 days ago

    Administrative assistant

    A path for every ambition. At HUB, we believe the best work happens when people are given real space to grow and then given the autonomy to exercise it. We power progress and protect ambition: for...

    onsite, Fresno, CA, United States
    $36k – $44k/yrFull TimeNo Skills
  • Behavior Frontiers

    Behavior Frontiers

    9 days ago

    Administrative assistant at corporate office

    Position Summary The Administrative Assistant supports the daily operations, organization, staff and visitor experience at the Behavior Frontiers Headquarters (BFHQ) office. This role provides...

    onsite, El Segundo, CA, United States
    $36k – $42k/yrFull TimeNo Skills
  • North Valley Services

    North Valley Services

    9 days ago

    Administrative assistant

    1. PURPOSE OF THE POSITION: Provides clerical services and administrative support to the CES Program Manager such as general record keeping, implementation and tracking of processes, data entry,...

    onsite, Red Bluff, CA, United States
    Full TimeNo Skills
  • Loyola High School of Los Angeles

    Loyola High School of Los Angeles

    12 days ago

    Administrative assistant- academic center for excellence

    Job Summary ADMINISTRATIVE ASSISTANT ACADEMIC CENTER FOR EXCELLENCE (ACE) POSITION SUMMARY The Administrative Assistant for The Academic Center for Excellence (ACE) serves as the primary...

    onsite, Los Angeles, CA, United States
    $45k – $50k/yrFull TimeNo Skills
  • Wayfinder Family Services

    Wayfinder Family Services

    12 days ago

    Program assistant

    Job Details: Job Location: South Sacramento - Sacramento, CA Position Type: Full-Time/Part-Time Education Level: High School Salary Range: $21.00 - $23.00 Hourly Travel Percentage: None Job Shift:...

    onsite, Sacramento, CA, United States
    $42k – $46k/yrFull TimeNo Skills
  • ProTec Building Services

    ProTec Building Services

    12 days ago

    Administrative assistant

    Summary The administrative Assistant will perform a variety of administrative and clerical tasks. The main duties of the Administrative Assistant include providing support to our managers and...

    onsite, Irvine, CA, United States
    Full TimeJunior (<2 years)
  • Feather River Tribal Health, Inc.

    Feather River Tribal Health, Inc.

    12 days ago

    Administration assistant

    POSITION SUMMARY: The Administrative Assistant performs a variety of complex administrative duties as an assistant to the Chief Executive Officer and Chief Operating Officer in matters pertaining to...

    onsite, Oroville, CA, United States
    $67k – $69k/yrFull TimeLead / Manager
  • Vanir Construction Management, Inc.

    Vanir Construction Management, Inc.

    13 days ago

    Administrative assistant

    About Vanir Vanir is a proud minority- and woman-owned company, recognized as a national leader in program, project and construction management (PMCM) and real estate development. Since 1964, we have...

    onsite, San Bernardino, CA, United States
    $46k – $50k/yrFull TimeJunior (<2 years)
  • InAlliance

    InAlliance

    15 days ago

    Administrative assistant

    Job Details: Job Location: Wheatland Office - Wheatland, CA Salary Range: $20.60 - $20.60 Hourly The Community Training Program (CTP) Administrative Assistant is responsible for providing...

    onsite, Wheatland, CA, United States
    $42k/yrFull TimeJunior (<2 years)
  • PragerU

    PragerU

    16 days ago

    Administrative assistant (office of ceo)

    Location: Los Angeles, California (on-site) Our mission is to promote American values through the creative use of digital media, technology and edu-tainment. We’re proud to be voted among the “Best...

    onsite, Los Angeles, CA, United States
    $56k – $67k/yrFull TimeNo Skills
  • Dairy Farmers of America

    Dairy Farmers of America

    19 days ago

    Office administrative assistant

    Perform varied administrative activities in support of individuals and/or a business area. Demonstrate a strong level of technical ability with a variety of tools, software applications, and/or...

    onsite, Santa Ana, CA, United States
    Full TimeJunior (<2 years)
  • Comprehensive Community Health Centers Inc.

    Comprehensive Community Health Centers Inc.

    20 days ago

    Administrative assistant (temp)

    Administrative Assistant Job Summary Provide high-level administrative support by conducting research, preparing statistical reports, handling information requests, heavy calendar management,...

    onsite, Glendale, CA, United States
    $44k – $50k/yrFull TimeLead / Manager
  • University of Southern California

    University of Southern California

    20 days ago

    Administrative assistant ii

    Administrative Assistant II - 50% FTE USC Marshall School of Business Brittingham Social Enterprise Lab The Brittingham Social Enterprise Lab (BSEL) is a Center of Excellence at the USC Marshall...

    onsite, Los Angeles, CA, United States
    $52k – $66k/yrPart TimeMiddle (2-4 years)
  • Episcopal Community Ser

    Episcopal Community Ser

    20 days ago

    Administrative assistant - accord

    About ECS/ Why work for us? We want you to apply because we believe everyone can make a positive impact. By joining ECS, you will directly improve the lives of children and their families and those...

    onsite, El Cajon, CA, United States
    Full TimeNo Skills
  • CALIFORNIA RURAL INDIAN HEALTH BOARD INC

    CALIFORNIA RURAL INDIAN HEALTH BOARD INC

    22 days ago

    Administrative assistant

    Job Details Job Location: California Rural Indian Health Board, Inc. - Roseville, CA Salary Range: $48487.00 - $57043.00 Salary/year Interested applicants are encouraged to submit their application...

    onsite, Roseville, CA, United States
    $48k – $57k/yrFull TimeJunior (<2 years)
  • Stantec

    Stantec

    23 days ago

    Administrative assistant

    Grounded in safety, quality, and ethics, our experts lead their fields and guide our work with rigor, a creative spirit, and a vision for growth. We draw from more than 20 technical specialties...

    onsite, Monrovia, CA, United States
    Part TimeMiddle (2-4 years)
  • DHL Express (USA), Inc.

    DHL Express (USA), Inc.

    a month ago

    Administrative assistant (a4)

    What makes DHL great? Our People! We know each employee’s individual contributions make us the #1 Delivery and Logistics Company in the world. Distinguished as No. 1 World’s Best Workplace™ by Great...

    onsite, Irvine, CA, United States
    $65k/yrFull TimeJunior (<2 years)
  • Boudreau Pipeline

    Boudreau Pipeline

    a month ago

    Administrative assistant

    Position Summary The Administrative Assistant provides comprehensive administrative and operational support to assigned departments and leadership. This role is responsible for managing daily office...

    onsite, Corona, CA, United States
    Full TimeJunior (<2 years)

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