Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Office Assistant

$20 per hour

Ultimate Staffing





Position Summary




The Office Assistant provides comprehensive administrative and office support to ensure efficient daily operations. This role requires a detail-oriented and dependable team member responsible for maintaining centralized and fireproof files, managing document archiving and file auditing processes, and providing front desk phone backup. The Office Assistant also supports general administrative functions across departments.




Schedule & Compensation








  • Work Schedule:


    Monday through Friday, 8:00 AM - 5:00 PM






  • Compensation:


    $20.00 per hour





Growth Potential




Employees who demonstrate strong organizational skills and proficiency in filing and archiving processes may have opportunities for advancement. This includes taking on expanded responsibilities and receiving training to support the Project Management (PM) Assistant Department.




Key Responsibilities






  • Provide backup support for the receptionist, including coverage for breaks, lunch periods, and scheduled time off.




  • Perform receptionist duties as needed, including but not limited to answering phones and assisting with general inquiries.




  • Assist with entry and tracking of City and State licenses.




  • Support administrative tasks such as data entry, document preparation, tracking, logging, and database follow-up.




  • Maintain and organize job-related documentation through accurate filing systems.




  • Close out estimator and Project Manager (PM) files and manage document archiving.




  • Prepare files and documentation for job audits.




  • Conduct full audits of project files prior to archiving.




  • Draft meeting minutes, cost estimates, and project-related correspondence.




  • Operate standard office equipment, including copiers, printers, postage machines, and computers.




  • Provide general administrative support as assigned to support overall office operations.





Qualifications & Skills






  • 2-5+ years of experience in the construction industry (preferred).




  • Strong knowledge of clerical and administrative procedures, including filing systems, record management, and office operations.




  • Proficiency in Microsoft Office Suite (Word, Excel, Outlook) and PDF/scanning tools.




  • Excellent attention to detail and organizational skills.




  • Ability to multitask and meet deadlines in a fast-paced environment.




  • Strong communication and interpersonal skills with a professional demeanor.




  • Team-oriented with the ability to collaborate effectively across departments.




  • Reliable, punctual, and adaptable to shifting priorities.





Physical Requirements






  • Ability to sit for extended periods while working at a desk or computer.




  • Ability to lift up to 15 pounds occasionally.




  • Capability to move throughout the office and access various departments as needed.





All qualified applicants will receive consideration for employment without regard to race, color, national origin, age, ancestry, religion, sex, sexual orientation, gender identity, gender expression, marital status, disability, medical condition, genetic information, pregnancy, or military or veteran status. We consider all qualified applicants, including those with criminal histories, in a manner consistent with state and local laws, including the California Fair Chance Act, City of Los Angeles' Fair Chance Initiative for Hiring Ordinance, and Los Angeles County Fair Chance Ordinance.


Ultimate Staffing
Vacancy posted 1 day ago
Similar jobs that could be interesting for youBased on the Office Assistant in Ontario, CA vacancy
  • $19 - $21 per hour

     ...supplier in laser printers and printer parts, located in Chino, CA. We are looking for a self-motivated and dependable full-time Office Assistant to join our team! Responsibilities: Process daily invoices and shipping labels in an accurate and efficient manner... 
    Suggested
    Hourly pay
    Full time
    Work at office
    Monday to Friday

    Accutek Imaging Resource Inc

    Chino, CA
    2 days ago
  •  ...1200 w mission blvd, Ontario Ca 91762     We are seeking an Office Administrator to join our team! You will perform clerical and administrative...  ...formal documents Plan and schedule appointments Greet and assist onsite guests Answer inbound telephone calls Develop and... 
    Suggested
    Work at office

    STELLAR TRAILERS CORP

    Ontario, CA
    a month ago
  • $21 - $26 per hour

     ...Dealership Business Office Assistant Ontario, CA Your next opportunity awaits at the Fletcher Jones Family of Dealerships. We are currently hiring a Business Office Assistant to join our centralized Regional Business Office team located in Ontario, California!... 
    Suggested
    Currently hiring
    Work at office
    Flexible hours

    Fletcher Jones Management West

    Ontario, CA
    a month ago
  • $17 - $20 per hour

     ...Job Description Job Description Join KASA Construction Inc. as an Bilingual Office and Accounting Assistant Job Title: Bilingual Office and Accounting Assistant Company Name: KASA Construction Inc. Salary: $17.00 - $20.00 per hour, depending on experience... 
    Suggested
    Hourly pay
    Full time
    For subcontractor
    Work at office
    Local area
    Monday to Friday
    Shift work

    The Contractor Consultants

    Chino, CA
    3 days ago
  • $28 - $32 per hour

     ...Job Duties Responsible for supervising, training and developing office staff Oversee branch office support activities including review,...  ...liaison to third party administrator for workers’ compensation claims Assist with scheduling of paid time off Maintain branch personnel files... 
    Suggested
    Full time
    Temporary work
    Work at office
    Local area
    Visa sponsorship
    Flexible hours

    Crown Equipment

    Ontario, CA
    3 days ago
  • $18.29 - $19.25 per hour

     ...9.25 Per Hour BENEFITS: VOALA offers competitive medical, dental, vision and retirement benefits. JOB SUMMARY AND PURPOSE The Office Assistant provides general basic office support, and acts as the office receptionist and telephone screener when required. Establishes and... 
    Hourly pay
    Work at office
    Local area

    Volunteers of America Los Angeles

    Pomona, CA
    1 day ago
  •  ...Office Assistant The Office Assistant provides general basic office support, and acts as the office receptionist and telephone screener when required. Establishes and maintains cooperative and harmonious working relationships with program staff, workers, families of... 
    Work at office

    Volunteers of America

    Pomona, CA
    1 day ago
  •  ...or G.E.D. equivalent and two years of increasingly responsible office administrative or secretarial experience; or some combination of...  .../compliance office (s) may be contacted at: Human Resources, Assistant Superintendent 950 W. D Street, Ontario CA 91762 909-459-2500 email... 
    Work at office
    Monday to Friday

    Ontario-Montclair School District (K-8)

    Ontario, CA
    2 days ago
  • $17.5 - $22.5 per hour

     ...Office Pride Part-Time Employment Opportunity With offices and operations across the country, Office Pride offers part-time employment...  ...guidelines, as appropriate to the position. May schedule or assist in scheduling appointments, meetings, and/or conferences, as... 
    Hourly pay
    Part time
    Work at office
    Flexible hours

    Office Pride

    Rancho Cucamonga, CA
    1 day ago
  •  ...prioritize responsibilities to complete daily work assignments. Works as part of a team to assist radiologists, technologists, co-workers, patients, and referring physician offices as needed. Education and Experience High School degree or equivalent Minimum... 
    Full time
    Shift work

    Rezolut

    Ontario, CA
    1 day ago
  • $20 per hour

     ...Office Assistant The Michaels Organization is a national leader in residential real estate offering full-service capabilities in development, property management, construction, and investment. At Michaels, our teammates strive to fulfill our promise of creating communities... 
    Hourly pay
    Work at office

    The Michaels Organization

    Claremont, CA
    2 days ago
  •  ...Requirements / Qualifications Training and Experience: High school diploma or equivalent and one (1) year of experience in a general office. Effective October 1, 2024: If you have an AA, Bachelor's, or Master's degree, you must also attach a copy of your high school... 
    Work experience placement
    Work at office
    Monday to Friday

    Corona-Norco Unified School District

    Norco, CA
    3 days ago
  •  ...Growth Opportunities Job Summary We are seeking a motivated and outgoing Administrative Assistant to join our team. In this role, you will provide support to our office employees, ensuring they have all the information and resources they need to perform their... 
    Work at office

    Inland Pacific Roofing Co Inc

    Upland, CA
    20 days ago
  • Remote Office Admin Assistant Part‑Time job at Top Level Promotions. Fontana, CA. Work from Home Office, Data Entry Remote Part‑Time/Full‑time Job About the Job Position: This remote entry‑level role comes with training for qualified candidates. Depending on your expertise... 
    Remote job
    Hourly pay
    Full time
    Part time
    Work at office
    Local area
    Work from home
    Home office
    Flexible hours

    Salón Večná kráska

    Fontana, CA
    2 days ago
  •  ...An established pediatric dental office is looking for Dental Assistants who are available to start immediately. We are seeking a candidate that is willing to work a part-time or full-time schedule, between Monday - Saturday. This job has friendly co-workers and great... 
    Full time
    Part time
    Work at office
    Immediate start

    TradeJobsWorkforce

    Jurupa Valley, CA
    4 days ago
  • $21 - $25 per hour

     ...company's value by keeping information confidential. Support front office, customer service, and accounts receivable when needed....  ...payment updates. Monthly reconcile uninvoiced PO receipt report, assist with yearend audits, and help with month-end closing.... 
    Hourly pay
    Work at office

    Honor Plastics & Molding

    Pomona, CA
    14 days ago
  •  ...Scheduling Assistant (Ontario) A Growing Shower Enclosure, Mirror and Wardrobe Door Manufacturing and Installation Company located in...  ...simultaneous deadlines Basic computer skills which include Microsoft Office (Excel, Word, Outlook (email) and the ability to learn internal... 
    For subcontractor
    Work at office
    Immediate start

    LARRY METHVIN INSTALLATIONS INC

    Ontario, CA
    4 days ago
  • Cosmo Appliances in Chino, California, seeks a detail-oriented Accounting & Administrative Assistant to support finance and office operations. The role combines accounting tasks and administrative duties, ideal for an organized and tech-savvy individual. Responsibilities... 
    Work at office

    Cosmo Appliances

    Chino, CA
    2 days ago
  • $20 - $21 per hour

    Financial Aid Office Assistant Department: Financial Aid Supervisor: Senior Financial Aid Counselor Last Updated: 10-20-25 General Description The Financial Aid Office Assistant provides a broad range of clerical and administrative support duties for the Office of Financial... 
    Hourly pay
    Full time
    Work at office
    Immediate start
    Remote work
    Monday to Friday
    Afternoon shift

    Pitzer College

    Claremont, CA
    2 days ago
  •  ...We are seeking a dedicated and detail-oriented Administrative Assistant to support our work providing outstanding communications services...  ...for a broad range of accounting support, billing, collections, office operations, and compliance tasks. The ideal candidate is... 
    Full time
    Work at office
    Flexible hours

    VMA Communications Inc

    Montclair, CA
    4 days ago
  •  ...Administrative Assistant Position Synergy HomeCare Synergy HomeCare Upland is looking for a Part Time Administrative Assistant. The...  ...Assistant will be responsible for helping as needed in areas of office organization, intake, recruiting, scheduling as well. Should be... 
    Part time
    Work at office
    Flexible hours
    Weekend work

    Synergy HomeCare

    Upland, CA
    3 days ago
  •  ...Temporary-To-Hire Administrative Assistant This position is a temporary-to-hire role. The selected employee will initially be working...  ...Additional duties include handling customer calls and performing basic office tasks as assigned by management. Duties & Responsibilities... 
    Temporary work
    Work at office

    Honor Plastics & Molding

    Pomona, CA
    4 days ago
  •  ...Administrative Assistant This role supports the core operations of a growing sports-focused business. The ideal candidate is someone who naturally keeps things organized, thinks several steps ahead, and notices small details before they become larger issues. This is... 
    Local area
    Remote work
    Work from home

    Johnny Allen Tennis

    Chino, CA
    4 days ago
  • $20 - $29.47 per hour

     ...Administrative Assistant Crown Innovations, Inc. is a dynamic and growing organization providing professional services and operational...  ...Assistant to support operations at our Ontario, California office. The ideal candidate will possess strong communication skills,... 
    Hourly pay
    Daily paid
    Full time
    Contract work
    For contractors
    Work at office
    Local area
    Monday to Thursday

    Crown Consulting

    Ontario, CA
    2 days ago
  •  ...Job Description Job Description Administrative Office Assistant (Bilingual English/Mandarin) Full-Time | On-site | Ontario, CA Company: SED PHARMA, INC. Position Overview We are seeking a highly organized and proactive Office Assistant to support daily... 
    Full time
    Work at office

    SED PHARMA INC

    Ontario, CA
    23 days ago
  •  ...added clearly and professionally: Job Description: Administrative Assistant (Bilingual Mandarin a Strong Plus) We are seeking a reliable, detail-oriented Administrative Assistant to support daily office operations. This is an entry-level role ideal for someone looking... 
    Work at office

    EFP Staffing

    Ontario, CA
    22 days ago
  •  ...onboarding documents. Ideal candidates will have a high school diploma, experience in a professional environment, and strong Microsoft Office skills. This full-time, in-office position includes benefits like medical insurance, 401(k) enrollment, paid holidays, and vacation... 
    Full time
    Work at office

    Allied Universal

    Ontario, CA
    4 days ago
  • Position Summary The Office Administrator is responsible for all on‑site print production and shipping operations at the location. This...  ...appropriately Maintain organized records of shipments and correspondence Assist with projects and other duties as assigned Security &... 
    Full time
    Work at office
    Immediate start
    Shift work

    The AQ Approach

    Ontario, CA
    4 days ago
  •  ...for a full-time surgery scheduler to coordinate surgeries and in-office procedures for our practice. We have three physicians which...  ...instructions Work with Front Office staff, Back Office medical assistants and physicians with regards to surgery appointments.... 
    Full time
    Work at office

    Premier Orthopedic Trauma Specialists

    Upland, CA
    a month ago
  • $18 - $18.25 per hour

     ...Office Clerk - Graveyard PCI Ontario Airport - Ontario, CA 91761 Start Date 04/09/2026 Salary Range $18.00 - $18.25 Hourly Position...  ...revenue reports Record data into reports Provide verbal assistance to customers when needed over intercom Dispatch shuttles... 
    Hourly pay
    Full time
    Work at office
    Shift work
    Night shift
    Weekend work

    Parking Concepts, Inc.

    Ontario, CA
    4 days ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Office Assistant. Be the first to apply!