378 Results for

Administrative Support Jobs in Ontario, CA

Jobs

New!

San Dimas, CAToday

$3,500–$5,500 Per Month
Full-time

As an Administrative Assistant, you will play a crucial role in supporting the daily operations of our team. Your responsibilities will include.

New!

Los Angeles, CA5 days ago

$24–$28 Per Hour

Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Join us in this exciting role where you will be a crucial part of our team, assisting in the delivery of top-notch financial consulting services to our esteemed clients.

Rancho Cucamonga, CA9 days ago

$5,196 Per Month
Contractor

Assist in the development and preparation of reports, board items, budgets, and grant proposals; verify information and calculations; collect data and provides research assistance for various studies and reports; assist in the monitoring of budget expenditures, research variances and discrepancies, and recommend changes to budget accounts; prepare and process purchase orders and requisitions. May function as office coordinator for a college service area; coordinate work of clerical staff in various component programs; assess hourly staff skill levels and provide or arrange training as needed; coordinates accounting systems of component programs.

New!

Irvine, CA5 days ago

$20–$31 Per Hour

Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. A growing public accounting team is seeking a detail-focused Tax Administrative Assistant to support tax professionals with the preparation, assembly, and delivery of client returns.

Alhambra, CA30+ days ago

$20–$30 Per Hour
Full-time
Employee

AHMC provides management services to AHMC Anaheim Regional Medical Center with 223 beds, Garfield Medical Center with 211 beds, Greater El Monte Community Hospital with 115 beds, Monterey Park Hospital with 102 beds, San Gabriel Valley Medical Center with 273 beds, Seton Medical Center with 357 beds, Seton Medical Center Coastside, a 116-bed skilled nursing facility, and Whittier Hospital Medical Center with 172 beds. The Administrative Assistant provides administrative support to the Senior Executive Vice President and the Corporate team in performing diversified administrative functions, which includes the maintenance of confidential records.

New!

Irvine, CAToday

$25–$29

Determining compensation for this role (and others) at Vaco by Highspring depends upon a wide array of factors including but not limited to: the individual’s skill sets, experience and training; licensure and certification requirements; office location and other geographic considerations; other business and organizational needs. Determining compensation for this role (and others) at Vaco/Highspring depends upon a wide array of factors including but not limited to the individual’s skill sets, experience and training, licensure and certifications, office location and other geographic considerations, as well as other business and organizational needs.

New!

Santa Ana, CA2 days ago

$25–$30 Per Hour
Temporary

We are seeking a reliable Administrative & Accounting Coordinator to support daily office operations in the manufacturing industry. Support bookkeeping: invoicing, A/R follow-up, deposits, credit card charges, reporting, and account reconciliation.

Brea, CA9 days ago

$21–$25 Per Hour

This position plays an important role in supporting our paralegals by assisting with document printing, client communication, and coordinating the final steps of the estate planning process. The ideal candidate enjoys helping clients, takes pride in getting the details right, and understands that responsiveness and care make a difference in the client experience.

Los Angeles, CA18 days ago

$21.50–$26 Per Year

Reconcile daily cash sale transaction payments and cash funds in the system, prepare the bank deposit, scan and process checks, prepare and submit required deposit paperwork to the Support Center. Maintain daily files for the Profit Center to include ship tickets, purchase order receivers, deposit back-ups, cash journals, and all daily reconciled reports. .

New!

Los Angeles, CA5 days ago

$25–$30 Per Hour

Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Today, its catalog includes furniture, lighting, wall art, home accessories, garden décor, and textiles reflecting a deep dedication to quality, style, and industry‑leading design.

New!

Garden Grove, CA2 days ago

$20–$22 Per Hour
Full-time
Employee

A manufacturing company located in Garden Grove is seeking an Administrative Assistant for their Shipping and Receiving Department to support daily administrative operations. This role is ideal for someone organized, friendly, and able to communicate effectively in both English and Japanese.

New!

Los Angeles, CA5 days ago

$70,000–$100,000 Per Year

Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Job Details: We are seeking an experienced Executive Assistant to support our CEO in the fast-paced and ever-evolving Legal Tech industry.

New!

Los Angeles, CA5 days ago

$70,000–$125,000 Per Year

Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. By applying for this job, you agree to receive calls, AI-generated calls, text messages, or emails from Jobot, and/or its agents and contracted partners.

New!

Los Angeles, CA5 days ago

$80,000–$110,000 Per Year

Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Over the years our reputation for providing our people with the very best has caught the eye of high-profile clients in business and the entertainment industry who have chosen to use us as their primary firm!

Los Angeles, California12 days ago

$85,746–$132,906 Per Year
Full-time

Work may also be conducted in outdoor environments, at construction sites, Railroad tracks and Right-of-Way environments, and warehouse environments, with possible exposure to individuals who are hostile or irate, moving mechanical parts, and loud noises (85+ decibels, such as heavy trucks, construction, etc.). The Contract and Compliance Administrator is a procurement officer who assists SCRRA departments with the ongoing contract administration and issuance of purchase orders for parts, construction, operations, maintenance, and professional services.

New!

Brea, CAToday

$23–$25

Irvine, CA10 days ago

Full-time
Employee

Irvine, CA10 days ago

Full-time
Employee

2+ years of administrative, purchasing, or coordination experience (construction or real estate industry preferred)Strong organizational skills and high attention to detailAbility to manage multiple tasks and meet deadlines in a fast-paced environmentStrong communication skills, both written and verbalProficiency in Microsoft Office (Excel, Word, Outlook); experience with ERP systems (e.g., Sage, SAP, or similar) is a plusExperience working with vendors, purchase orders, or contracts is highly preferred. Determining compensation for this role (and others) at Vaco by Highspring depends upon a wide array of factors including but not limited to: the individual’s skill sets, experience and training; licensure and certification requirements; office location and other geographic considerations; other business and organizational needs.

Irvine, CA10 days ago

Full-time
Employee

2+ years of administrative or office support experienceStrong organizational skills with the ability to multitask in a fast-paced environmentExcellent communication skills, both written and verbalProficiency in Microsoft Office (Excel, Outlook, Word)Professional, reliable, and detail-orientedAbility to work both independently and collaboratively. Determining compensation for this role (and others) at Vaco by Highspring depends upon a wide array of factors including but not limited to: the individual’s skill sets, experience and training; licensure and certification requirements; office location and other geographic considerations; other business and organizational needs.

Irvine, CA10 days ago

Full-time
Employee

Maintain and organize the investor portal, including reports, distributions, and correspondenceManage investor inquiries, document requests, and ongoing communicationsConduct regular audits of the investor database to verify contact, wire, tax, and commitment informationCoordinate annual mass investor mailings and customized mail merges (digital and physical)Track and manage communications for new funds and investorsSupport the planning and coordination of the annual investor conference, serving as the primary point of contact for presentation preparationOversee distribution of quarterly and annual reports, capital account statements, capital calls, and investor noticesCoordinate annual investor tax distributions, including 1099s, K?1s, and demand letters. Bachelor’s degree requiredMinimum of 3+ years supporting senior-level or C?suite executivesBackground in finance or legal environments strongly preferredHighly organized with exceptional attention to detailStrong written and verbal communication skillsAdvanced professionalism and discretion when handling confidential mattersProactive, solutions-oriented mindset with a desire to improve processes and efficiencyProficiency in Microsoft Office (Excel, PowerPoint, Word); comfort with databases and portals a plus.

New!

Los Angeles, CA4 days ago

$65,911.68–$88,823.04 Per Year

Pursuant to the County Charter and County policy, in all open competitive examinations (i.e., examinations open to everyone), the County of Los Angeles will add a credit of 10 percent of the total credits specified for such examination to the final passing score of an honorably discharged veteran, as well as the spouse of a deceased or disabled veteran, who served in the Armed Forces of the United States under specific conditions. **In the County of Los Angeles, the level of Staff Assistant I is defined as having responsibility for the housekeeping and record keeping functions, and conducts administrative studies of internal operations and procedures as an assistant to the manager of a line operation in a County department.

Los Angeles, CA12 days ago

$45,000–$55,000 Per Year

Dykema Gossett, PLLC, a leading national law firm celebrating its 100th anniversary in 2026, is recruiting for an experienced Receptionist / Administrative Support Assistant (ASA) to provide administrative support to meet the daily needs of our Los Angeles office and deliver exceptional customerservice. Provides overflow administrative support including preparation of correspondence and legal documents from electronic drafts, handwritten notes, or electronic dictation; prepares materials for meetings; organizes and file documents; assists with mass mailings and file management.

Los Angeles, CA12 days ago

$21–$22 Per Hour

We're seeking a highly organized and proactive professional to provide essential support to staff and leadership teams, contributing to a mission-driven and dynamic environment. Youll work closely with executive staff to keep daily activities running seamlessly, making a real impact in public service.

Riverside, CA30+ days ago

Full-time

Knowledge of: Principles of administration, organization and management necessary to analyze and evaluate operations, services and programs; principles and practices of fiscal management and/or budgetary control; grantsmanship; basic elements of supervision; and/or contract monitoring. Riverside County Department of Facilities Management provides property management and operations services for county owned and leased facilities throughout the 7,200 square miles of Riverside County and over 14 million square feet of space.

Los Angeles, California17 days ago

$45,000–$55,000 Per Year

Who We Are: With more than 1,000 attorneys, policy advisors, e-discovery professionals, and other business professionals across offices in California, Colorado, the District of Columbia, Florida, Georgia Illinois, Maryland, Massachusetts, Minnesota, New York, Ohio, Pennsylvania, Tennessee, Texas, Virginia, West Virginia, and throughout North Carolina and South Carolina, Nelson Mullins has strong roots in the business community and an appreciation for new directions in the business world. Overview: Nelson Mullins, an AmLaw60 law firm, is seeking an Administrative Support Assistant to provide high-level administrative support to a dynamic team of legal professionals in the downtown Los Angeles office.

Los Angeles, California24 days ago

The Administrative Support Coordinator provide support for the executive leadership team by managing and supporting their initiatives, operations, daily activities, events, and communications. Energetic and focused personality with a demonstrated ability to take initiative, successfully handle and prioritize multiple competing assignments and effectively manage deadlines.

New!

Ontario, CA2 days ago

$19.84–$25.01 Per Hour

Responsibilities may include typing, filing, data entry, answering phones, managing travel arrangements, obtaining supplies, running and preparing reports and working on special projects, preparing reports, managing all incoming and outgoing mail, composing letters, memos and proposals, communicating with executives and creating presentations. With offerings including uniforms, mats, mops, towels, restroom supplies, workplace water services, first aid and safety products, eye-wash stations, safety training, fire extinguishers, sprinkler systems and alarm service, Cintas helps customers get Ready for the Workday®.

Los Angeles, CA30+ days ago

Remote

$45,760–$58,240

As a Remote Administrative Support Specialist, you will play a crucial role in providing exceptional administrative support to our gig workers and ensuring a seamless experience on our platform. NoGigiddy, a leading gig staffing platform revolutionizing the industry, is seeking a motivated and detail-oriented Remote Administrative Support Specialist to join our dynamic team.

Orange, CA30+ days ago

Our independent insurance business is built on the relationships we build with our Team, clients, potential clients, our community, and the companies we work with. Establish working relationships with clients, potential clients, and companies we represent on the phone, email, and on paper.

Los Angeles, CA7 days ago

Explore its iconic landmarks, world-class dining, and vibrant cultural scene. Experience the glitz and glamour of Los Angeles, California's entertainment capital.

Los Angeles, CA30+ days ago

$65,000–$85,000 Per Year

Arrowhead is leading the field in bringing the promise of RNAi to address diseases outside of the liver, and our clinical pipeline includes disease targets in the liver and lung with a promising pipeline of preclinical candidates. Travel & Congress Management: Coordinate and manage domestic and international travel arrangements for various congresses, including flights, accommodations and event logistics, ensuring a smooth and efficient experience.

New!

Brea, California4 days ago

$22–$24

As a vital member of our team, you will collaborate closely with administrators and employees, organize files, create correspondence, and prepare reports and other key documents. Support customers and the credit department in resolving credit holds, CODs (cash on delivery), and processing credit card payments.

Corona, CA26 days ago

$20–$25 Per Hour

Communication Technology Services, CTS, is one of the largest integrators and managed service providers for mobile networks in the U.S. The company specializes in the design, installation and support of Distributed Antenna System (DAS), Small Cell, and 4G/5G Private Wireless Networks for the mobile network operators, enterprise and venue owners and network infrastructure owners. Support construction billing processes, including invoice preparation, change order tracking, cost reconciliation, and maintaining accurate billing and financial records.

Los Angeles, California30+ days ago

$69,500–$100,800 Per Year

The firm has approximately 2,500 lawyers and professionals serving clients in major centers of business, finance, technology, and government in Boston, Chicago, Dublin, Hong Kong, London, Los Angeles, Milan, New York, Paris, San Francisco, Seoul, Shanghai, Silicon Valley, Singapore, Tokyo and Washington, D.C. The firm has consistently been recognized for its leading practices in many areas, including asset management, private equity, M&A, finance, real estate, tax, antitrust, life sciences, health care, intellectual property, litigation & enforcement, privacy & cybersecurity, and business restructuring. The Legal Administrative Assistant will coordinate travel arrangements, including booking flights, hotels, and ground transportation, and will process invoices and expense reports, reviewing submissions for accuracy, ensuring correct coding, and resolving discrepancies in a timely manner.

Orange, CA26 days ago

Full-time

Talley, LLP, along with its affiliated entities—Talley Law Group (TLG), Talley Capital Group (TCG), and Talley Wealth, LLC—is a full-service financial, tax, legal, and consulting firm dedicated to serving entrepreneurially driven businesses, high-net-worth individuals, and professional athletes. The ideal candidate is proactive, solutions-oriented, operationally minded, and excited about leveraging AI-enabled tools, workflow automation, and modern technology solutions to improve efficiency, scalability, and administrative operations across the firm.

Garden Grove, CA9 days ago

$24–$33

This role is ideal for someone who thrives in a fast-paced healthcare environment and enjoys coordinating schedules, supporting participants and families, and providing excellent customer service. The Administrative Assistant will help ensure smooth clinic operations by coordinating specialty appointments, arranging transportation, maintaining records, and collaborating with interdisciplinary teams.

Pasadena, California30+ days ago

$22–$30 Per Hour

We are seeking a detail-oriented Administrative Assistant / Collections Coordinator to support our office operations and accounts receivable process. This role requires prior experience in restoration or construction, as well as strong organizational, communication, and follow-up skills.

New!

Los Angeles, CALIFORNIA4 days ago

Our client specializes in delivering high-quality ground-up construction projects across a diverse range of commercial sectors, including financial institutions, healthcare facilities, religious organizations, education, and other complex commercial developments. Known for their commitment to quality, integrity, and long-term client relationships, they are seeking an experienced Administrative Assistant to help the VP with many office-related tasks.

Costa Mesa, CA30+ days ago

$32.69–$33.65 Per Hour

This role is ideal for a proactive professional who has successfully supported senior leadership teams, managed high-level administrative responsibilities, and created professional presentations and marketing materials with exceptional attention to detail. We are seeking a highly polished Senior Administrative Assistant with strong executive support experience and a creative eye for graphic design to join a respected organization in Costa Mesa.

Costa Mesa, CA30+ days ago

As an Administrative Assistant at High Seas, you will play a crucial role in supporting the General Manager and ensuring effective communication and system management within our dynamic environment. We are seeking a motivated Administrative Assistant to support our General Manager in ongoing business operations and ensure smooth daily operations at our vibrant dispensary.

Costa Mesa, California30+ days ago

$24–$26 Per Hour

Convenient location in the vibrant city of Costa Mesa with easy access to dining for lunch. -Maintain office supplies inventory and ensure proper functioning of office equipment.

New!

Los Angeles, CA4 days ago

Schedules meetings, books conference rooms and maintains the visitor log; manages conference room setups to ensure reservation requests are met prior to scheduled meeting; manages video conferencing setups, assists guests with connecting to WIFI and with login troubleshooting . The Administrative Assistant will support the front-of-house functions and provides reception and conference center coverage and assist Legal Support Specialists and Attorneys with administrative tasks and responsibilities.

Santa Ana, CA24 days ago

$18–$20 Per Hour

Duties of the Administrative Assistant include providing support to our managers and employees, assisting in daily office needs, and managing our company’s general administrative activities. We work closely with city, county, and state social service agencies, police departments, victim advocates, family resource centers, nonprofit agencies, and community service programs.

Santa Ana, CA20 days ago

Screen mail and callers, respond to and route inquiries to appropriate personnel as necessary; determine the importance and priority of various issues and determine what major issues should be brought to the attention of the department head and/or department members. Provide advanced assistance to departments by performing various administrative support functions, including but not limited to, analytical and specialized administrative duties to ensure efficient office operations.

Costa Mesa, California30+ days ago

$33–$34 Per Hour

Design and produce high-quality digital and print marketing materials (presentations, brochures, tradeshow assets, product packaging, and web content). This combination role will be responsible for providing high-level executive support while leading the development and execution of marketing and creative initiatives.

Los Angeles, CA7 days ago

$43.50–$48.50 Per Hour

If you have 5 years of litigation legal administrative assistant experience within a mid-size law firm supporting several attorneys, apply today and we look forward to speaking with you soon. Position responsibilities include, but are not limited to the following: Administrative Support:Manage and maintain attorneys' schedules, including arranging meetings, appointments, and travel.

Cerritos, CA30+ days ago

Full-time

As the leading importer with the largest in-stock decorative flowers, greenery and home decor, Allstate Floral is always looking to recruit and retain exceptional people who are skilled, confident, innovative and committed to providing excellent customer service to buyers. Proactively keep executives and senior leadership informed of project status, key milestones, risks, and next steps—particularly for events and special initiatives—so leadership does not need to ask for updates.

montebello, CA30+ days ago

Provide comprehensive clerical support to the Director of Operations, including scheduling appointments, managing correspondence, and preparing reports. In this role, you'll play a crucial part in ensuring our operations run smoothly by providing exceptional administrative support and customer service.

New!

Brea, CA4 days ago

Proficiency in Microsoft Office and related business software, including word processing, spreadsheets, databases, and desktop publishing applications. Answer incoming telephone calls; route calls to appropriate personnel; and respond professionally to inquiries from clients and prospective clients.

Corona, CA13 days ago

The ideal candidate will be comfortable managing front desk responsibilities, assisting with administrative tasks, and providing excellent customer service in a fast-paced environment. We are seeking a professional and organized Receptionist / Administrative Assistant to join our team.

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Administrative Support Jobs in Ontario, CA

Administrative Assistant Five Star CCTV

Administrative Assistant Jobot

Administrative Assistant II, Distance Education Chaffey College

Tax Administrative Assistant Jobot

Administrative Assistant AHMC Healthcare Inc

Administrative Assistant Vaco LLC

Administrative Assistant Kinetic Personnel Group

Legal Administrative Assistant - Paralegal Assistant The Wagon Legacy

Sr Profit Center Office Administrator Hajoca Corporation

Purchasing Assistant Jobot

Administrative Assistant – Shipping & Receiving [Bilingual English / Japanese Languages] DSA International

Executive Assistant Jobot

Litigation Legal Assistant Jobot

Litigation Legal Assistant / Legal Secretary (No Family Law Experience required) Jobot

Contract & Compliance Administrator MetroLINK

HR Assistant Vaco LLC

Administrative Coordinator Company Confidential

Administrative/Purchasing Coordinator Company Confidential

Office Administrator Company Confidential

Executive Assistant Company Confidential

ADMINISTRATIVE ASSISTANT II/EMERGENCY APPOINTMENTS HOMELESSNESS County of Los Angeles, CA

Receptionist - Administrative Support Assistant Dykema

Administrative Support for a government client-Hiring now! 837342 Helpmates

Administrative Services Analyst II - Analytical and Administrative Support County of Riverside

Administrative Support Assistant Nelson Mullins Riley & Scarborough, LLP

Administrative Support Coordinator Allied Universal

Administrative Support Professional Cintas

Remote Administrative Support Specialist - No Degree Required NoGigiddy

Receptionist/Administrative Support AALI - Orange, CA

Administrative Support - Customer Service TotalMed Staffing

Specialist, Administrative Support Arrowhead Pharmaceuticals

Administrative Assistant/Customer Service Rep Ultimate Staffing Services

Administrative Assistant- SoCal Communication Technology Services (CTS)

Legal Administrative Assistant Ropes & Gray

Tax Administrator - AI Enabled Talley LLP

Administrative Assistant (PACE Clinic ) at Garden Graove, CA Aroha Technologies

Administrative Assistant / Collections Ultimate Staffing Services

Administrative Assistant (Construction) K2 Staffing

Sr. Administrative Assistant 836603 Helpmates

Administrative Assistant High Seas

Administrative Assistant Ultimate Staffing Services

Administrative Assistant Intern Greenberg Traurig

Administrative Assistant Casa de la Familia

Office Administrative Assistant Mission Landscape Companies, Inc

Senior Administrative Assistant Ultimate Staffing Services

Litigation Legal Administrative Assistant Snell & Wilmer

Executive Administrative Assistant Allstate Floral Inc.

Administrative Assistant to the Director of Operations PARENT EDUCATION BRIDGE FOR STUDENT ACHIEVEMENT FOUNDATION LLC

Administrative Assistant Tech Tammina

Receptionist / Administrative Assistant Kinetic Personnel Group, Inc.

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