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Weekend Office Jobs in Riverside, CA (NOW HIRING)

Avid Bioservices

Office Assistant

Tustin, CA · On-site

$17.50 - $23/hr

The Office Assistant provides administrative, workplace, and facilities support to ensure the ... The employee must also have the ability to work overtime and/or weekends when necessary.

EV Mode

Office Administrator

Irvine, CA · On-site

$20 - $24/hr

Office Administrator We are looking for a reliable, paid full-time Office Administrator. They will undertake administrative tasks, ensuring the rest of the staff has adequate support to work ...

Avid Bioservices

Office Assistant

Tustin, CA · On-site

$17.50 - $23/hr

The Office Assistant provides administrative, workplace, and facilities support to ensure the ... The employee must also have the ability to work overtime and/or weekends when necessary.

iLink Business Management

Be Seen First

Office Manager

Ontario, CA · On-site

$25 - $30/hr

The Office Manager will oversee day-to-day administrative operations for a small on-site team of 1-5 employees. This role requires managing multiple responsibilities across office coordination ...

Jobless

Office Manager

Santa Ana, CA · On-site

Executive Assistant & Office Manager FLSA Status: Exempt Reports To: Scout Executive / CEO Position Summary & Purpose The Executive Assistant & Office Manager serves as the trusted administrative ...

Tustin Toyota

Office Manager

Tustin, CA · On-site

$75K - $105K/yr

Overview TUSTIN TOYOTA is looking for Energetic Office Manager professional who doesn't mind wearing multiple hats. Experienced in handling a wide range of administrative tasks and able to work ...

Tustin Toyota

Office Manager

Tustin, CA · On-site

Overview TUSTIN TOYOTA is looking for Energetic Office Manager professional who doesn't mind wearing multiple hats. Experienced in handling a wide range of administrative tasks and able to work ...

York Employment

Office Assistant

Rancho Cucamonga, CA · On-site

$20 - $21/hr

We are hiring for a Office Assistant in Rancho Cucamonga to provide administrative and project coordination support to ensure efficient daily operations and timely completion of office tasks. This ...

Avid Bioservices

Office Manager

Tustin, CA · On-site

The Office Manager is responsible for overseeing the daily administrative and facilities-related ... The employee must also have the ability to work overtime and/or weekends when necessary.

GSI Environmental Inc.

Office Coordinator

Irvine, CA · On-site

$19.25 - $25.50/hr

Supports GSI's technical employees through a variety of tasks related to office organization and internal and external communications. Must have the ability to effectively communicate in person and ...

Avid Bioservices

Office Manager

Tustin, CA · On-site

The Office Manager is responsible for overseeing the daily administrative and facilities-related ... The employee must also have the ability to work overtime and/or weekends when necessary.

Avid Bioservices

Office Manager

Tustin, CA · On-site

Manage day-to-day office functions to ensure smooth operations * Maintain office systems ... The employee must also have the ability to work overtime and/or weekends when necessary.

Tustin Toyota

Office Manager

Tustin, CA

$75K - $105K/yr

TUSTIN TOYOTA is looking for Energetic Office Manager professional who doesn't mind wearing multiple hats. Experienced in handling a wide range of administrative tasks and able to work independently ...

Special

Office Assistant

Orange, CA · On-site

$19 - $20/hr

The Office Assistant is responsible for front desk management, administrative tasks, and coordination of office logistics in our corporate office. This role includes greeting visitors, handling ...

CYNET SYSTEMS

Administrator - Office

Foothill Ranch, CA · On-site

$31 - $36/hr

Proficient in Microsoft Office (Word, PowerPoint, Excel). * Tech savvy. Responsibilities: * Organize, coordinate, and implement office processes and procedures to ensure organizational effectiveness ...

Tustin Toyota

Office Manager

Tustin, CA · On-site

Overview TUSTIN TOYOTA is looking for Energetic Office Manager professional who doesn't mind wearing multiple hats. Experienced in handling a wide range of administrative tasks and able to work ...

CJS

Office clerk

Pomona, CA · On-site

$16.50 - $18/hr

To continue to do so we are looking to hire an enthusiastic, passionate office Clerk representative. Individual should have a roll-up-the-sleeves mentality and work style and be able to operate ...

CJS

Office clerk

Pomona, CA · On-site

$16.50 - $18/hr

To continue to do so we are looking to hire an enthusiastic, passionate office Clerk representative. Individual should have a roll-up-the-sleeves mentality and work style and be able to operate ...

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Showing results 41-60

All JobsOffice JobsWeekend Office JobsWeekend Office Jobs in Riverside, CA

Weekend Office information

See Riverside, CA salary details

$26.6K

$53.7K

$80.9K

How much do weekend office jobs pay per year?

As of Sep 15, 2026, the average yearly pay for weekend office in Riverside, CA is $53,704.00, according to ZipRecruiter salary data. Most workers in this role earn between $41,700.00 and $61,600.00 per year, depending on experience, location, and employer.

What is a weekend office?

Weekend office jobs are positions that require employees to work primarily on Saturdays and Sundays, often in administrative, customer service, or support roles. These jobs can involve responsibilities such as answering phones, managing files, handling customer inquiries, or assisting with basic office tasks. Weekend office roles are ideal for individuals seeking part-time work, students, or those looking to supplement their income. Employers offering weekend shifts may include medical offices, call centers, property management companies, and other organizations that operate outside of standard business hours.

What are the typical responsibilities and expectations for someone working in a weekend office role?

In a Weekend Office role, you can expect to handle a variety of administrative tasks such as answering phone calls, managing appointments, and providing customer service support. Since weekend staffing is often leaner, you may also be responsible for opening or closing procedures, troubleshooting basic issues, and helping maintain office supplies. Collaboration with weekday staff is important to ensure smooth handovers and effective communication. This role often requires strong multitasking skills and the ability to work independently while maintaining a professional and welcoming environment for visitors and clients.

What are the key skills and qualifications needed to thrive as a weekend office administrator, and why are they important?

To thrive as a Weekend Office Administrator, you need organizational skills, proficiency in office procedures, and a high school diploma or equivalent. Familiarity with office software such as Microsoft Office Suite, basic data entry systems, and sometimes phone or scheduling systems is typically required. Strong communication, time management, and problem-solving abilities help you efficiently support staff and address weekend-specific issues. These skills ensure smooth office operations and effective support during weekend hours when resources may be limited.

What is the difference between Weekend Office vs Weekend Customer Service Representative?

AspectWeekend OfficeWeekend Customer Service Representative
Required CredentialsHigh school diploma or equivalent; basic computer skillsHigh school diploma; communication skills; sometimes training provided
Work EnvironmentOffice setting, administrative tasks, computer workCall centers, retail environments, direct customer interaction
Employer & Industry UsageBusinesses needing administrative support on weekendsRetail, telecom, service industries handling customer inquiries

Weekend Office roles typically involve administrative tasks in an office environment, requiring basic computer skills and a high school diploma. In contrast, Weekend Customer Service Representatives focus on assisting customers, often in call centers or retail settings, emphasizing communication skills. Both roles are common in industries that operate on weekends, but they differ in daily tasks and work environment.

What are the most commonly searched types of Office jobs in Riverside, CA?

The most popular types of Office jobs in Riverside, CA are:

What cities near Riverside, CA are hiring for Weekend Office jobs?

Cities near Riverside, CA with the most Weekend Office job openings:

Weekend Office jobs near you
Infographic showing various Weekend Office job openings in Riverside, CA as of August 2026, with employment types broken down into 1% As Needed, 83% Full Time, 14% Part Time, and 2% Contract. Highlights an 86% Physical, 4% Hybrid, and 10% Remote job distribution, with an average salary of $53,704 per year, or $25.8 per hour.

Office Assistant

Tustin, CA • On-site

Avid Bioservices
Pharmaceutical and Medicine Manufacturing • 51 - 200 employees
Learn more about Avid Bioservicesexternal

$17.50 - $23/hr

Full-time

Medical, Dental, Vision, Retirement, PTO

Re-posted 27 days ago

Job description

Description
Looking to join a passionate team dedicated to developing and manufacturing life-saving biopharmaceuticals? Avid Bioservices is a leading clinical and commercial biologics CDMO focused on creating innovative solutions to meet the needs of our clients and improve patient outcomes.
Your Role:
The Office Assistant provides administrative, workplace, and facilities support to ensure the efficient day-to-day operation of the office. Reporting to the Office Manager, this position assists with office coordination, front-desk responsibilities, workplace services, vendor support, meeting logistics, and employee experience activities. The Office Assistant serves as a key resource for maintaining a professional, organized, and welcoming work environment while supporting workplace operations and facilities-related activities.
Key Responsibilities:
Administrative & Office Support
  • Provide day-to-day administrative support to the Office Manager and office staff.
  • Assist with maintaining office procedures, records, and filing systems.
  • Support office communications, announcements, and distribution of information.
  • Order, receive, stock, and organize office and breakroom supplies.
  • Maintain office supply inventory and notify the Office Manager of replenishment needs.
  • Assist with workspace setup for new hires, employee moves, and office reconfigurations.
  • Support scheduling and coordination of conference rooms and meeting spaces.

Front Desk & Workplace Experience
  • Serve as a primary point of contact for employees, visitors, clients, and vendors.
  • Ensure reception areas, conference rooms, breakrooms, and common areas remain clean, organized, and stocked.
  • Assist with meeting room setup, catering coordination, and event preparation.
  • Support executive and client visit logistics as directed by the Office Manager.
  • Help maintain workplace standards that promote a positive employee and guest experience.

Facilities & Workplace Coordination
  • Assist in submitting, tracking, and following up on facility service requests.
  • Monitor office areas and report maintenance, safety, or housekeeping issues to the Office Manager.
  • Coordinate vendor access and escort vendors when required.
  • Support routine workplace inspections and identify areas requiring attention.
  • Help coordinate furniture moves, workstation setups, and office adjustments.
  • Support preventive maintenance activities by coordinating communications and access as needed.
  • Partner with Facilities, IT, and EHS teams to facilitate timely issue resolution.

Vendor & Service Coordination
  • Assist with scheduling vendor services, including janitorial, landscaping, pest control, and office equipment maintenance.
  • Track completion of vendor work and escalate concerns to the Office Manager.
  • Help collect vendor documentation, certificates of insurance, and service reports.
  • Support procurement activities and office-related purchasing requests.

Financial & Procurement Support
  • Assist with processing invoices, purchase requisitions, and purchase orders.
  • Maintain records related to office expenses and supply purchases.
  • Help reconcile office supply orders and deliveries.
  • Research products and obtain vendor quotes when requested.

Employee Support & Engagement
  • Assist with onboarding logistics, including workspace preparation, supply coordination, and employee welcome activities.
  • Support employee engagement and workplace events.
  • Promote workplace organization, cleanliness, and professionalism.
  • Assist with logistics for meetings, training sessions, employee activities, and special events.

Compliance & Safety Support
  • Assist in maintaining workplace signage, safety supplies, and emergency information.
  • Support safety inspections, audits, and workplace readiness activities.
  • Report safety concerns or facility deficiencies EHS.
  • Help maintain emergency contact lists, evacuation maps, and workplace communication materials.
  • Support adherence to company policies and workplace procedures.

Minimum Qualifications:
  • Associate degree or equivalent work experience preferred.
  • 1-3 years of experience in office administration, customer service, workplace operations, or a related role.
  • Experience supporting a corporate office environment preferred.
  • Strong organizational and time management skills.
  • Excellent verbal and written communication skills.
  • Customer-service-oriented with a professional demeanor.
  • Proficiency with Microsoft Office (Outlook, Word, Excel, Teams).
  • Ability to manage multiple tasks and priorities effectively.
  • Strong attention to detail and follow-through.
  • Ability to work independently while maintaining close coordination with the Office Manager.
  • Problem-solving skills and a proactive approach to office support.

Preferred Qualifications:
  • Experience supporting facilities or workplace operations.
  • Familiarity with work order or service request systems.
  • Experience coordinating meetings, visitors, and office events.
  • Experience in life sciences, corporate, or regulated office environments is a plus.

Position Type/Expected Hours of Work:
This role is a full-time onsite position. Days and hours of work are Monday through Friday unless otherwise stated by Supervisor. The employee must also have the ability to work overtime and/or weekends when necessary.
Compensation:
We offer competitive compensation packages for this role, including a base salary, performance-based bonuses, and comprehensive benefits such as health, dental, and vision insurance, 401(k) matching, and paid time off.
The compensation range for this role is $21.53 - $26.92 hourly depending on experience and qualifications. Additionally, we offer opportunities for career growth and development as well as a supportive and inclusive work environment.
Who you are:
  • You have a "bring it on!" team player approach and an unshakable positive attitude, always ready to tackle anything that comes your way.
  • Your written and verbal skills are out of this world, and you communicate with clarity and confidence.
  • You have exceptional multitasking skills and an unparalleled attention to detail that ensure the smooth running of everything.
  • You are a master at building relationships, capable of establishing connections with anyone, be it team members, clients, vendors, or suppliers.

Physical Demands & Work Environment:
In this dynamic role, expect a blend of regular activities like sitting, standing, and walking, with occasional physically engaging tasks such as lifting objects up to 25 pounds. The work environment might expose you to electrical shocks, toxic chemicals, vibrations, or loud noise levels occasionally. However, reasonable accommodations are available to enable individuals with different abilities to perform effectively, ensuring a supportive and adaptable work setting. Your visual acuity, including close, distance, and color vision, will be essential in navigating through the diverse day-to-day demands of this position.

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