We are looking for a dedicated and detail-oriented Part time Administrative Assistant to join our team in Chino, California. In this role, you will provide essential support to human resources operations and act as a key point of contact with our HR and payroll management partner, Optimum HR. This is a fantastic opportunity to gain hands-on experience in HR processes while collaborating with industry professionals. This is a long-term contract position. Responsibilities:• Collaborate with Optimum HR to manage and oversee HR and payroll procedures effectively.• Verify employee time records and prepare accurate payroll submissions on a bi-weekly basis.• Assist with onboarding and offboarding processes in accordance with established protocols.• Communicate policies related to timekeeping, benefits, and leave clearly to employees.• Organize and maintain personnel files, ensuring compliance with company and legal standards.• Handle HR documentation using a cloud-based system for efficient record-keeping.• Respond to employee inquiries regarding HR or payroll matters within a timely manner.• Support day-to-day administrative functions to streamline HR operations.

• Prior experience in administrative or HR roles is preferred but not mandatory. • Strong organizational skills and a proactive approach to work are essential. • Excellent communication skills for clear and precise interactions. • Ability to learn and follow structured HR guidelines and processes. • High attention to detail with a commitment to maintaining confidentiality. • Familiarity with cloud-based systems and standard office software is required. • Reliable and consistent in meeting deadlines and responding to inquiries. • Willingness to work approximately 20 hours per week in a part-time capacity.

<h3 class="rh-display-3--rich-text">TalentMatch®</h3> 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. <a href="https://www.roberthalf.com/us/en/mobile-app" target="_blank">Download the Robert Half app</a> 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 <a href="https://roberthalf.gobenefits.net/" target="_blank">roberthalf.gobenefits.net</a> for more information. © 2025 Robert Half. An Equal Opportunity Employer. M/F/Disability/Veterans. By clicking “Apply Now,” you’re agreeing to <a href="https://www.roberthalf.com/us/en/terms">Robert Half’s Terms of Use</a>.

Chino, CA
onsite
Temporary
21.00 - 25.00 USD / Hourly
We are looking for a dedicated and detail-oriented Part time Administrative Assistant to join our team in Chino, California. In this role, you will provide essential support to human resources operations and act as a key point of contact with our HR and payroll management partner, Optimum HR. This is a fantastic opportunity to gain hands-on experience in HR processes while collaborating with industry professionals. This is a long-term contract position. Responsibilities:• Collaborate with Optimum HR to manage and oversee HR and payroll procedures effectively.• Verify employee time records and prepare accurate payroll submissions on a bi-weekly basis.• Assist with onboarding and offboarding processes in accordance with established protocols.• Communicate policies related to timekeeping, benefits, and leave clearly to employees.• Organize and maintain personnel files, ensuring compliance with company and legal standards.• Handle HR documentation using a cloud-based system for efficient record-keeping.• Respond to employee inquiries regarding HR or payroll matters within a timely manner.• Support day-to-day administrative functions to streamline HR operations.
2025-11-05T21:44:06Z