1,534 Results for

Business Assistant Jobs in Costa Mesa, CA

Jobs

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!

Orange, CA3 days ago

$20–$22 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. The successful candidate will be responsible for managing front office operations, assisting with administrative tasks, and providing exceptional service to our staff and visitors.

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Irvine, CA6 days ago

$23–$26

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.

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Newport Beach, CA3 days ago

$150,000–$200,000 Per Year

This role combines operational execution with process improvement, partnering closely with leadership to build scalable accounting processes that support a fast-growing business. 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.

New!

Beverly Hills, CA3 days ago

$150,000–$225,000 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. Reviewing and assessing quarterly budget to actual variances and preparing a quantitative and qualitative analysis, including line item and Executive Summary analyses, on the Company’s actual results relative to the budget.

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Irvine, CA3 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.

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Huntington Beach, CA6 days ago

$28–$29

Huntington Beach, CA7 days ago

$26–$28

New!

Newport Beach, CA2 days ago

$20–$21.89 Per Hour

1+ years of clerical or secretarial experience, or an equivalent combination of business school/secretarial training and job-related experience. Provide routine administrative support for a department or administrative unit.

New!

Commerce, CA3 days ago

Temporary

A well-established food distribution company in Commerce is seeking a reliable and detail-oriented Administrative Assistant to support daily office operations. This position will assist with administrative, accounting, and customer service functions while helping ensure accurate processing of delivery documentation and office records.

Los Angeles, CA30+ days ago

$72,000–$76,000 Per Year

As our Assistant Branch Manager Officer, you'll be the driving force behind a branch that runs like clockwork — where customers leave happy, staff feel empowered, and every day brings a new opportunity to make an impact. Alongside the Branch Manager, you'll champion a workplace where enthusiasm is contagious, collaboration is the norm, and every team member feels valued and motivated to bring their best.

New!

Orange, CA4 days ago

$35,000–$42,000 Per Year

See Sharp HealthCare Terms & Conditions at https://www.sharp.com/patient-rights-privacy/terms-of-use.cfm and Privacy Policy at https://www.sharp.com/patient-rights-privacy/privacy-practices.cfm and SonicJobs Privacy Policy at https://www.sonicjobs.com/us/privacy-policy and Terms of Use at https://www.sonicjobs.com/us/terms-conditions. The actual pay rate and pay grade for this position will be dependent on a variety of factors, including an applicant’s years of experience, unique skills and abilities, education, alignment with similar internal candidates, marketplace factors, other requirements for the position, and employer business practices.

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Orange, CA4 days ago

$35,000–$42,000 Per Year

New!

Gardena, CA3 days ago

Since 2008, Lifespan Therapy has empowered qualified clinicians to connect with homebound geriatric patients across California through our innovative app-based network. Perform Therapeutic Interventions: Focus on functional strengthening, gait training, balance, and fall risk reduction to help patients reach their mobility goals.

New!

Fontana, CA5 days ago

$18.74–$23.47 Per Hour

ONSITE - full time onsite in Fontana ( with travel one day per week to support the Pico Rivera Service Center located in Pico Rivera, CA 90660. Assist in lab maintenance activities, including new chemical approvals, chemical inventory, lab computer management, and hazardous waste disposal coordination.

Garden Grove, CA16 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.

Torrance, CA16 days ago

$24.34–$38 Per Hour
Full-time

Lennar is one of the nation's leading homebuilders, dedicated to making an impact and creating an extraordinary experience for their Homeowners, Communities, and Associates by building quality homes and providing exceptional customer service, giving back to the communities in which we work and live in, and fostering a culture of opportunity and growth for our Associates throughout their career. Requires the ability to work more than eight hours per day in the confined quarters of a construction trailer, the ability to operate a motor vehicle, read plans, climb stairs and ladders, bend, stoop, reach, lift, move and/or carry equipment which may be in excess of 50 pounds.

Irvine, CA16 days ago

$19.36–$28 Per Hour
Full-time

Los Angeles, CA17 days ago

$28–$33 Per Day
Full-time

Real Estate investment & property management Co. based in Los Angeles since 1975 is in need of an ADMINISTRATIVE ASSISTANT. It is also readily accessible to MTA transportation with many restaurants and amenities within walking distance.

Rancho Palos Verdes, CA19 days ago

$18,200–$18,200.01 Per Year
Full-time
Employee

Health Insurance: Low bi-weekly premiums ($34.62) for employee only coverage, Kaiser HMO for those residing in a Kaiser service area, Anthem EPO/PPO is available for those residing outside of a Kaiser service area. Parental Leave: Benefit will be one week (5 business days) of paid leave at the employee's normal rate of pay for births, adoptions and foster placements.

DOD-Park Place, CA20 days ago

$21–$25 Per Hour

The ideal candidate enjoys working with people, thrives in a fast-paced environment, and takes pride in keeping operations running efficiently. Our growing portfolio of affiliated dental brands and practice models range from large regional brands to uniquely branded local practices.

Riverside, CA30+ days ago

$30–$45 Per Hour

An exciting opportunity is available in our downtown Riverside office for an experienced legal assistant/secretary with comprehensive transactional knowledge and top-notch technical, communication and administrative skills. This position requires excellent technical, administrative, communication and organizational skills, attention to detail and the ability to work well independently and with others in a team oriented and demanding office environment.

New!

Irvine, CA2 days ago

$40,000–$70,000 Per Year

We are seeking an Administrative Assistant to assist a Partner and an Attorney in our Business Department who specialize in representing closely held businesses by providing transactional business, real estate and tax services. Our FUN Committee organizes small events every month, in addition to several larger events throughout the year including an Admin Day celebration, summer party, Harvest Lunch and Christmas Lunch.

Newport Beach, CA30+ days ago

$107,000–$160,000 Per Year

Position Summary: Holland & Knight's Newport Beach office seeks a highly skilled Executive Assistant to support a Partner in driving strategic marketing and business development initiatives. This role will play a key part in designing and implementing targeted marketing campaigns that promote the Firm and its several (national and international) practice groups, with a focus on the needs of the local Southern California markets.

New!

El Monte, CA2 days ago

Must be able to cope with mental and emotional stress related to working with persons who are ill, disabled, elderly and/or emotionally upset, and/or memory impaired . Depending on a number of factors, including, but not limited to location, regularly scheduled work shift, knowledge, skills, experience, and expertise.

La Habra, CA13 days ago

$181,320–$231,372 Per Year

The emphasis of the position is to provide leadership, administrative responsibility, and strategic planning for the District''s business operations, including finance, facilities, bond-funded construction and modernization projects, maintenance, purchasing, transportation, nutrition services, and safety. Additionally, the position is responsible for overseeing the preparation of the annual budget, managing cash flows and public financing, making complex presentations to the Board of Education and outside agencies, and ensuring strict compliance with all applicable local, state, and federal laws and reporting guidelines.

New!

Ontario, CA2 days ago

$20–$25 Per Hour

This role works closely with the Administrator and Business Office Manager to ensure efficient office processes, accurate documentation, and excellent customer service for residents, families, and staff. At Las Colinas Post Acute, we're more than just a skilled nursing facility-we're a team committed to providing exceptional care in a supportive, compassionate environment.

Los Angeles County, CA30+ days ago

Reporting to the Director of Revenue Cycle, the Assistant Director, Business Office provides operational leadership across hospital business office functions. Analyze operational and financial data and prepare reports related to collections, reimbursement, cash posting, payment arrangements, refunds, and other business office metrics.

New!

Jurupa Valley, CA2 days ago

Ensures Medicare eligibility and prior research is completed Ensures that criteria for Medicare, Medi-Cal, and TARS billing is met and accurately billed Assists with Medi-Cal tracking Prepares billing for agencies, Medicare, veterans, and other billing agents. Assist with the management of the business office, including but not limited to, supervising, organizing, evaluating, and monitoring business office operations and staff responsible and private insurance management maintains a good working relationship with residents, patients and their families, and facility personnel.

Torrance, California30+ days ago

$105,000–$181,000 Per Year

Under direction of the Director, Revenue Cycle, the Assistant Director, Business Office oversees the daily operations of the Hospital’s business office functions, including ensuring the timely and accurate completion of billing, collections, and more. Oversees the timely completion of all essential business office functions, including billing, collections, cash posting, and accounts receivable management; investigates and addresses inefficiencies.

Beverly Hills, California30+ days ago

This role will primarily prepare various reports such as cash flow, cash-in-bank, and flooring payoff as well as reconcile monthly bank statements, factory parts statements, flooring, vehicle inventory and other general bookkeeping duties as needed. Provide administrative support to management as needed, reporting to the Beverly Hills Controller and to the Senior Corporate Data & Reporting Analyst.

New!

Garden Grove, CA2 days ago

We are a skilled nursing facility looking for dynamic associates to join our team and provide our guests with a care experience that will change their lives! Provides clerical and administrative assistance to support the office manager and administrator of the facility.

New!

Ontario, CA6 days ago

$21–$26 Per Hour

At Fletcher Jones, we attract, nurture, and retain the most talented people in the industry by providing the highest quality work environment where productivity, creativity, and personal and professional growth can flourish. We are currently hiring a Business Office Assistant to join our centralized Regional Business Office team located in Ontario, California!

CA30+ days ago

Ensure that administrative personnel follow established ergonomics policies and procedures governing lifting techniques, repetitive tasks, and the use of safety equipment and supplies to prevent work-related injuries and illnesses. Serves as a key representative of the community and makes an active contribution towards community relations, public regard and overall awareness of the community.

Santa Ana, CA25 days ago

$11,168–$15,432 Per Year

Interview Timeline: Level I: Level II: Proposed Board Approval Date: June 23, 2026 The start date for this position is negotiable, with a planned start date no earlier than June 23, 2026 For any inquiries, please contact Personnel Technician Yesenia Lopez at (714) 558-5717 or via email at yesenia.lopez@sausd.us. • Resume • Bachelor''s Degree in Accounting • Certified Public Accountant (CPA), Chartered FinancialAnalyst (CFA), or Certified Government Financial Management (CGFM) is preferred.

Inglewood, California30+ days ago

The Assistant General Manager, Business Development - Booking & Live Entertainment must provide unified senior leadership across both venues — bringing strategic vision, deep industry relationships, and team-building capability to an operation that requires both big-picture planning and day-to-day booking excellence. This leader must expertly navigate NBA blackout dates, changeover windows, and scheduling constraints to identify and book complementary events — major concerts, collegiate sports championships, family shows, and special productions — that keep the building active and revenue-generating around the team's home schedule.

CA16 days ago

Remote

$89,590–$105,400 Per Year

Regionally accredited by the WASC Senior College and University Commission (WSCUC) and recognized by U.S. News & World Report among the Best Online Programs for 13 consecutive years (2013-2025), the university has a long track record of online innovation. With 55+fully online, career-focused programs designed around the realities of work, family, and constant change, we remain ever-focused on developing future-ready learners who can thrive in a rapidly shifting world.

El Segundo, CA8 days ago

$40,280–$57,008 Per Year

Responsibilities Weekly data management across all clients and resources Consolidating and integrating reports across multiple sources Providing accurate daily and weekly reporting to stakeholders of all levels Bringing analytical rigor and precision to all reporting deliverables Providing insights into trends and seasonality Applying analytical curiosity and AI tools across all tasks Identifying opportunities to automate analyses and drive process improvements and efficiencies Partnering with resource and operations managers to understand variances in projects and staffing Managing deadlines and communicating issues, concerns, and questions in a timely manner Working extended hours, including weekends, as required Performing all other duties as assigned Qualifications Bachelor's degree in Mathematics, Statistics, Finance, Economics, Business Administration or another quantitative discipline Proficiency in using Microsoft Excel for data manipulation, analysis, charting, and automation Demonstrated ability to aggregate, clean, and parse large datasets Experience presenting data insights across multiple levels of an organization Experience using AI tools for analysis and within Microsoft Office tools Experience in process management and improvement Intellectual curiosity and forward-thinking approach to all tasks Strong attention to detail and ability to prioritize tasks and manage time effectively Proven problem-solving and critical thinking skills Strong written and verbal communication skills Ability to identify errors or conflict in data feeds and provide thoughtful solutions Prior experience in consulting or advertising in an analytics or operations role is a plus Additional information Our Publicis Groupe motto "Viva La Différence" means we're better together, and we believe that our differences make us stronger. We also believe that creating transformational work requires initiative, an entrepreneurial spirit and a bold commitment to achieving measurable results and business success for the Clients we service.

los angeles, CA30+ days ago

$40,000–$50,000 Per Year

We provide a competitive total rewards package including a discretionary bonus and a variety of benefits including health insurance coverage, life and disability insurance, retirement savings plans, company paid holidays and unlimited paid time off (PTO), mental health and wellness resources, pet insurance, childcare resources, identity theft insurance, fertility assistance programs, and fitness reimbursement. Schedule, attend, and participate in client/internal meetings; capture and distribute meeting recap notes to clients and internal team members, summarizing all deliverables and next steps.

Torrance, CA30+ days ago

$53,542.64–$86,955.54 Per Year

PRINCIPAL RESPONSIBILITIES: The successful candidates responsibilities will include, but not be limited to: Under the direction of the DMBD, identify, create, and sell revenue opportunities through strategic positioning of mall assets, media assets, and mall programming in order to achieve the sales goals of the property. PRIMARY PURPOSE: This position is responsible to assist in the creation, development, and implementation of the overall revenue generation strategies and strategic marketing direction of the shopping center and in order to meet corporate property business and marketing objectives.

Redondo Beach, CA10 days ago

Identify the personal financial goals and needs of business clients; build collaborative relationships with partners across lines of business (Chase Wealth Management, Home Lending, Branch Teams) to connect clients with specialists who can help meet their financial needs. Acquire, manage, and retain a portfolio of 100-130 business clients with annual revenue of $1 - $5 million for your assigned branches; provide business deposit and cash management solutions and manage business credit opportunities up to approximately $1.5 million.

New!

Irvine, CA3 days ago

$94,000–$141,000 Per Year

Appropriately assess risk when business decisions are made, demonstrating particular consideration for the firm's reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparency. The Business Banker is responsible for proactively sourcing, acquiring, expanding, and retaining customer relationships by maximizing sales opportunities in an assigned Area, growing and retaining a book of business, and ensuring a world-class customer experience for all current and prospective clients.

Manhattan Beach, CA30+ days ago

Share on X Print Application Deadline: Until Filled Date Posted: 22-07-2026 Contact: Valeria Galicia Phone: 310-318-7345 5914 Number of Openings: 10 Salary: Pay dependent on experience Addl Salary Info: Varies - See Classified Substitute Hourly Rate: Length of Work Year On Call Employment Type: Part Time. SUBSTITUTE ADMINISTRATIVE SUPPORT STAFF - SCHOOL ADMINISTRATIVE ASSISTANT SUB OFFICE SPECIALIST SUB REGISTRAR SUB ADMINISTRATIVE SUPPORT ASST.

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Orange, CA2 days ago

Maintain paper and electronic filing systems, process incoming and outgoing correspondence, prepare reports and presentations, manage office supplies, operate office equipment, and support database management and document processing activities. By applying for this job, you agree to receive calls, AI-generated calls, text messages, or emails from and its affiliates, and contracted partners.

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Huntington Beach, CA6 days ago

$64,368.50–$86,781.96 Per Year

Advancement to the next level of Administrative Assistant I is based on need, requires compliance with the job qualifications and the ability to provide support to administrative committees, official proceedings, and processes requiring a higher level of specialization and reporting relationship and provide varied and difficult support to business and academic processes, usually reporting to a senior level administrator and coordinating work flow among other support staff. Requires a working knowledge of computer- based software programs that support this Administrative Assistant level of work, including, but not limited to, word processing, spreadsheet, presentation graphics, desktop publishing, special applications used by the organization unit, and data entry onto custom databases.

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Long Beach, CA2 days ago

We offer a full suite of benefits, including medical, dental, vision, short and long-term disability coverage, accident insurance, critical illness insurance, basic and supplemental life insurance, employee assistance plan, retirement savings and matching, and other developmental opportunities. This role is ideal for someone who thrives in a fast-paced environment and can effectively managemultiple priorities, including front desk operations, office coordination, internal communications, and event support.

Corona, CA30+ 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.

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.

Torrance, California30+ days ago

$71,110–$106,670 Per Year

For more than 40 years, the Chicago-based supply chain solutions leader has relied on a consultative approach to build a global network and trusted partnerships in nearly every industry, including aerospace, automotive, consumer retail, energy, food, government, high-tech, industrial, life sciences and marine. Identify opportunities to improve administrative processes and enhance efficiency across leadership support workflows, exercising discretion and independent judgment in prioritizing work, determining appropriate actions, and aligning efforts with evolving leadership needs.

New!

Bellflower, CA2 days ago

$17–$23 Per Hour

Keywords: ABA, Applied Behavioral Analysis, CNA, Certified nurse assistant, behavioral health, RBT, Registered Behavioral Tech, Mental Health, Entry Level, Aid, Respite Care, Caregiver, Paraprofessional, Assistant, Home Health, DSP, Direct Support Professional, Patient care technician, Care Tech, LPN, Psychology. At 360 Behavioral Health, our Administrative Assistants play a key role in helping our clinicians, leaders, and staff succeed while ensuring exceptional care for the individuals we serve.

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Business Assistant Jobs in Costa Mesa, CA

Administrative Assistant AHMC Healthcare Inc

Front Desk Admin Assistant Jobot

Administrative Assistant Vaco LLC

Assistant Controller Jobot

Assistant Controller - Family Office Jobot

Tax Administrative Assistant Jobot

Human Resources Assistant Vaco LLC

HR Assistant Vaco LLC

Associate Administrative Assistant Axelon

Administrative Assistant Kinetic Personnel Group

Assistant Bank Branch Operations Manager AtWork – Orlando

Medical Assistant - Podiatry - SRS Rancho Bernardo - Full-Time - Day Shift SHARP HEALTHCARE

Medical Assistant - SRS Primary Care - Rancho Bernardo - Full-Time - Day Shift SHARP HEALTHCARE

Home Health Physical Therapy Assistant (PTA) -PTA LICENSE REQUIRED Lifespan Therapy

Administrative Assistant-US Axelon

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

Sr Construction Field Assistant Lennar Homes

Jr Construction Field Assistant Lennar Homes

Administrative Assistant Reliable Properties

Summer Office Assistant - $350/week The Salvation Army Northwest Division

Business Assistant Smile Brands Group Inc

Legal/Executive Assistant Business/Corporate Law VARNER & BRANDT LLP

Admin Assistant - Business Department JBA International

Executive Assistant to Partner (Marketing & Business Development Focus) Holland & Knight LLP

Business Office Assistant - Skilled Nursing Facility Eastland Sub Acute and Rehabilitation

Assistant Superintendent - Business Services LA HABRA CITY SCHOOL DISTRICT

Business Office Assistant PACS

Assistant Director, Hospital Business Office 26-00081 Alura Workforce Solutions

Business Office Assistant Riverside PostAcute Care

Assistant Director, Business Office Torrance Memorial Medical Center

Automotive Business Office Assistant O'GARA Beverly Hills

Business Office Assistant SUN MAR MANAGEMENT SERVICES

Dealership Business Office Assistant Fletcher Jones Management West

Business Office Assistant PACS Group Inc

Assistant Director, Business Services Santa Ana Unified School District

Assistant General Manager, Business Development - Booking & Live Entertainment Intuit Dome

Full Time Faculty Assistant or Associate Professor of Business Strategy/Change Management (Remote) University of Massachusetts Global

Business Operations Assistant Analyst Publicis Groupe SA

Assistant Strategist, Business Solutions (LA) Horizon Media LLC

Assistant Director, Marketing & Business Development Simon Property Group Inc

Business Relationship Manager II - Assistant Vice President JPMorgan Chase & Co

Business Relationship Manager South Orange County CA, Assistant Vice President Citigroup Inc

SUBSTITUTE Administrative Support Staff - School Administrative Assistant Sub, Office Specialist Sub, Registrar Sub, Administrative Support Asst. Sub HS, Attendance Assistant Sub, Clerical Assistant Sub Manhattan Beach City School District

Administrative Assistant The Fountain Group LLC

Administrative Assistant - School of Nursing Coast Community College District

Administrative Assistant/Front Desk Specialist Integrated Polymer Solutions

Administrative Assistant- SoCal Communication Technology Services, LLC

Senior Administrative Assistant Ultimate Staffing Services

Senior Administrative Assistant AIT Worldwide Logistics, Inc.

Administrative Assistant 360 Behavioral Health

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