Administrative Assistant III / Accounts Payable Clerk

***Please note: This is a temporary position that is onsite and not remote. Candidates must be based in the Houston area, as relocation assistance is not provided. Only individuals authorized to work in the U.S. will be considered.***

Job Title: Administrative Assistant III / Accounts Payable Clerk

Job Type: Temporary

Job Salary: $25.00 - $30.00/hour *depending on experience*

Job Schedule: M-F, 40 hrs/week

Job Location: Houston, TX 77002

Advanced Microsoft Excel skills required! Skills will be tested during onboarding.

Position Summary

We are seeking a detail-oriented Administrative Assistant III / Accounts Payable Clerk with strong Microsoft Office skills—particularly Excel , including VLOOKUP , pivot tables, and spreadsheet management. This role supports Accounts Payable operations, vendor payments, invoice processing, and administrative functions within a high-volume, deadline-driven environment. Experience in government, public sector, or non-profit accounting is highly preferred. This is a temporary opportunity offering professional growth and the chance to support a mission-driven organization.

Key Responsibilities

Accounts Payable & Vendor Support

• Process vendor invoices accurately and in a timely manner.
• Perform 3-way matching (invoice, PO, receipts) when required.
• Prepare and route vendor payments, check requests, and ACH documentation.
• Maintain vendor records, W-9s, and ensure compliance with organizational policies.
• Research and resolve invoice discrepancies, payment questions, and vendor inquiries.

Excel & Data Management

• Utilize VLOOKUP , pivot tables, filters, and advanced Excel functions to analyze and reconcile data.
• Maintain AP logs, spreadsheets, and financial tracking documents.
• Support monthly reconciliation and reporting.

Administrative Support

• Prepare correspondence, reports, and internal communications.
• Maintain organized filing systems (digital and physical).
• Support department leadership with scheduling, documentation, and administrative tasks.
• Assist with audits, compliance requirements, and internal reviews.

General Office & Compliance

• Ensure accuracy and confidentiality of all financial and administrative records.
• Adhere to internal controls, procurement rules, and compliance standards typical of government or non-profit environments.
• Collaborate with internal departments such as Finance, HR, and Procurement.

Requirements

Qualifications

Required

• 3–5 years of experience as an Administrative Assistant, AP Clerk, or related role.
  
• Strong Microsoft Excel proficiency ( VLOOKUP required , pivot tables preferred).
  
• Experience with vendor payments, invoice processing, and accounts payable workflows.
  
• High attention to detail and accuracy.
  
• Excellent communication and customer service skills.
  

Preferred

• Experience in government, municipality, county, public sector, or non-profit organizations.
  
• Experience with ERP or accounting software (e.g., SAP, Oracle, PeopleSoft, NetSuite, or similar).
  
• Knowledge of procurement policies and compliance standards.