Temporary Weekend Accounts Payable Jobs in Missouri

Accounts Payable Accountant
St. Louis, MO
*Great opportunity to help impact a major organization here in the STL area during an implementation!
Job Description
This role focuses on end-to-end accounts payable processing, including 3-way match, invoice coding, and reconciliation activities, while supporting a large enterprise resource planning (ERP) implementation. The Accounts Payable Accountant manages both purchase order and non-purchase order invoices, troubleshoots system and data issues, and maintains high accuracy in a fast-paced, evolving environment. This position requires strong Excel skills, comfort with manual workarounds, and the ability to follow and maintain structured processes, especially during system go-live and transition periods.
Responsibilities

• Perform full-cycle accounts payable activities, including 3-way match and processing both purchase order and non-purchase order invoices.
• Code invoices accurately to the correct general ledger accounts and cost centers to ensure proper financial reporting.
• Track invoice queues and maintain an organized workflow to ensure timely and accurate invoice processing.
• Support the ERP implementation by helping to build and maintain a cutover log and assisting with transition-related tasks.
• Reconcile the accounts payable subledger to the general ledger during the system transition and investigate discrepancies.
• Identify gaps between expected system behavior and actual performance, and help troubleshoot issues as they arise.
• Perform basic voucher and import troubleshooting, including importing journal entries, batch data entry, and manual entries as needed.
• Own and maintain specific aspects of the accounts payable process during go-live, ensuring consistency and adherence to established procedures.
• Handle repetitive tasks with sustained focus and high accuracy, maintaining quality and reliability in daily work.

Essential Skills

• At least 3 years of experience in Accounts Payable
• Strong understanding of accounts payable fundamentals, including 3-way match and processing both PO and non-PO invoices.
• Proficiency in coding invoices to the correct accounts and cost centers.
• Ability to perform basic voucher and import troubleshooting, including importing journal entries and batch data entry.
• High level of proficiency in Excel for tracking invoice queues, building cutover logs, reconciling the AP subledger to the general ledger, and analyzing data.

Additional Skills & Qualifications

• Experience working with a large ERP system.
• Experience with an accounts payable OCR tool that scans and processes AP invoices.
• Background in supporting system implementations or large-scale finance projects is beneficial.
• Strong analytical and problem-solving skills to troubleshoot discrepancies and system issues.
• Effective organizational skills to manage multiple invoices, queues, and logs simultaneously.

Work Environment
This position is based in a professional, in-office setting with a beautiful, modern workspace. The role follows a Monday through Friday schedule during standard business hours, with some flexibility as needed. You will work on-site as part of a major organization and support a large ERP project during a significant transition period. The environment emphasizes accuracy, consistency, and independent work, with exposure to enterprise-level systems, Excel-based tracking tools, and accounts payable OCR technology.
Job Type & Location
This is a Contract position based out of Saint Louis, MO.
Pay and Benefits
The pay range for this position is $26.00 - $30.00/hr.
Individual compensation offered for this position within this range will depend on many factors, including qualifications, skills, relevant experience, job knowledge, geographic location, internal equity, and other pertinent job-related factors.
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 Saint Louis,MO.
Application Deadline
This position is anticipated to close on Sep 5, 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.