Administrative Assistant

We are looking for a detail-oriented Administrative Assistant to support billing operations for a busy service environment in Orange, California. This contract opportunity with permanent potential is ideal for someone who can manage a fast-paced workload, maintain organized records, and communicate effectively with both internal teams and customers. The role focuses on invoice processing, documentation review, and administrative coordination to help ensure timely and accurate billing activity.

Responsibilities:
• Handle a high daily volume of invoices, maintaining accuracy and timeliness throughout the billing process.
• Examine inspection documentation, service records, and quoted work to prepare charges for invoicing.
• Confirm that required approvals, sign-offs, and supporting paperwork are complete before billing is submitted.
• Communicate with team members and customers to obtain missing details, clarify incomplete reports, and keep billing items moving forward.
• Submit invoices through customer-designated billing portals while following each client’s formatting and submission guidelines.
• Maintain billing logs and tracking spreadsheets to monitor completed work, invoice progress, and unresolved items.
• Investigate rejected invoices, payment questions, and account discrepancies to support prompt resolution.
• Perform general administrative support duties, including data entry, call handling, and front-office coordination as needed.

Qualifications:

• At least 2 years of experience in administrative support, billing, or a related office-based role.
• Demonstrated ability to process detailed information accurately in a high-volume work setting.
• Experience with invoice preparation, billing follow-up, and documentation review.
• Strong data entry skills with close attention to accuracy and record management.
• Clear communication skills for coordinating with customers and internal departments.
• Comfortable using spreadsheets, billing platforms, and standard office software.
• Ability to manage multiple priorities, follow established procedures, and meet deadlines.

Compensation

$23.75-$27.50 Hourly

About Us

TalentMatch^®

Robert Half is the world’s first and largest specialized talent solutions firm that connects highly qualified job seekers to opportunities at great companies. We offer contract, temporary and permanent placement solutions for finance and accounting, technology, marketing and creative, legal, and administrative and customer support roles.

Robert Half works to put you in the best position to succeed. We provide access to top jobs, competitive compensation and benefits, and free online training. Stay on top of every opportunity - whenever you choose - even on the go. Download the Robert Half app and get 1-tap apply, notifications of AI-matched jobs, and much more.

All applicants applying for U.S. job openings must be legally authorized to work in the United States. Benefits are available to contract/temporary professionals, including medical, vision, dental, and life and disability insurance. Hired contract/temporary professionals are also eligible to enroll in our company 401(k) plan. Visit roberthalf.gobenefits.net for more information.

© 2025 Robert Half. An Equal Opportunity Employer. M/F/Disability/Veterans. By clicking “Apply Now,” you’re agreeing to Robert Half’s Terms of Use and Privacy Notice.