Accounts Payable Assistant Jobs in Riverside, CA

Looking for an opportunity to jump in, contribute immediately, and showcase your Accounts Payable expertise? We're seeking an AP Clerk to support a busy accounting team in a high-impact role.
Job Title: Accounts Payable Clerk
Job Description
The Accounts Payable Specialist supports the finance team by accurately processing vendor invoices, maintaining detailed accounting records, and ensuring timely payments to suppliers. This role handles a high volume of data entry, performs three-way matching of invoices, purchase orders, and receipts, and collaborates with internal departments and vendors to resolve discrepancies. The position is fully onsite and is ideal for someone with strong attention to detail, solid accounts payable experience, and the ability to manage multiple priorities in a structured, deadline-driven environment.
Responsibilities

• Review and process vendor invoices by verifying coding, pricing, supporting documentation, and overall accuracy before entering them into the accounting system.
• Match invoices with corresponding purchase orders and receiving documents, ensuring proper three-way matching and promptly resolving any discrepancies.
• Record and maintain accurate accounting entries, including adjustments and corrections when necessary.
• Reconcile vendor accounts and manage monthly payment processes for assigned suppliers.
• Review vendor statements on a regular basis, investigate outstanding issues, and coordinate resolutions with vendors, warehouse personnel, and internal departments.
• Maintain organized electronic vendor files and supporting documentation in accordance with company policies.
• Assist with organizing work orders and ensure supporting records are properly matched and filed.
• Support month-end and routine accounting activities as requested by the finance leadership team.
• Perform additional accounting, administrative, or financial duties as assigned by leadership.
• Handle a fluctuating invoice volume, typically ranging between approximately 150 and 350 invoices per week, with a significant amount of data entry.
• Utilize accounting software and ERP systems to process transactions, maintain records, and support reporting needs.
• Communicate effectively with internal stakeholders and external vendors to clarify information and resolve issues related to invoices, payments, and account balances.

Essential Skills

• 2 years of accounts payable or related accounting experience, with at least 2+ years handling invoice processing and purchase orders.
• Hands-on experience with invoice processing, vendor reconciliations, and account maintenance.
• Strong understanding of accounts payable procedures, basic accounting principles, and financial recordkeeping practices.
• Proficiency with accounting software and automated financial systems, including ERP platforms such as Sage Intacct or similar systems.
• Demonstrated ability to perform three-way matching of invoices, purchase orders, and inventory receipts.
• Accurate data entry skills with the ability to handle a high volume of transactions on a weekly basis.
• Intermediate-level Microsoft Excel skills, including use of formulas, sorting, filtering, and spreadsheet maintenance.
• Strong attention to detail and accuracy when reviewing, verifying, and reconciling numerical data.
• Effective written and verbal communication skills for interacting with vendors and internal teams.
• Strong organizational and time-management skills with the ability to manage multiple priorities and meet deadlines.
• Ability to prepare and maintain routine accounting and administrative documentation.
• Ability to work independently while collaborating effectively with internal and external stakeholders.
• High school diploma or equivalent.

Additional Skills & Qualifications

• Associate's degree or coursework in Accounting, Finance, Business, or a related field is preferred but not required.
• Experience working with purchase orders and inventory receipts in an accounts payable environment.
• Comfort working with fluctuating invoice volumes and adapting to changing workload demands.
• Ability to learn and work within different ERP or accounting systems beyond Sage Intacct.
• Willingness to support month-end close and other routine accounting processes as needed.
• Preference for candidates who bring strong practical experience, even without a formal degree.

Work Environment
This position is fully onsite, working a standard schedule of 8:00 a.m. to 5:00 p.m. in an office-based accounting environment. The Accounts Payable Clerk uses accounting software, ERP systems such as Sage Intacct, and Microsoft Excel on a daily basis to process a high volume of invoices and maintain accurate financial records. The role involves frequent interaction with warehouse staff, internal departments, and external vendors to coordinate invoice and payment-related information. The environment is structured, detail-oriented, and deadline-driven, with an emphasis on accuracy, organization, and professional communication. Dress is typically consistent with a professional office setting.
Job Type & Location
This is a Contract position based out of Brea, CA.
Pay and Benefits
The pay range for this position is $24.00 - $25.00/hr.
Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following:
• Medical, dental & vision
• Critical Illness, Accident, and Hospital
• 401(k) Retirement Plan - Pre-tax and Roth post-tax contributions available
• Life Insurance (Voluntary Life & AD&D for the employee and dependents)
• Short and long-term disability
• Health Spending Account (HSA)
• Transportation benefits
• Employee Assistance Program
• Time Off/Leave (PTO, Vacation or Sick Leave)
Workplace Type
This is a fully onsite position in Brea,CA.
Application Deadline
This position is anticipated to close on Aug 12, 2026.
About Aston Carter
Aston Carter provides world-class corporate talent solutions to thousands of clients across the globe. Specialized in accounting, finance, human resources, talent acquisition, procurement, supply chain and select administrative professions, we extend the capabilities of industry-leading companies. We draw on our deep recruiting expertise and expansive network to meet the evolving needs of our clients and talent community with agility and excellence. With offices across the U.S., Canada, Asia Pacific and Europe, Aston Carter serves many of the Fortune 500. We are proud to be a ClearlyRated Best of Staffing® Platinum Award winner for both client and talent service.
The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.
If you would like to request a reasonable accommodation, such as the modification or adjustment of the job application process or interviewing process due to a disability, please email astoncarteraccommodation@astoncarter.com for other accommodation options.
San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.
Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.
Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.