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Supervisor, Accounts Payable

Job in Seattle, King County, Washington, 98127, USA
Listing for: Port of Seattle
Full Time position
Listed on 2026-01-06
Job specializations:
  • Finance & Banking
    Accounting & Finance, Financial Compliance
Salary/Wage Range or Industry Benchmark: 100000 - 125000 USD Yearly USD 100000.00 125000.00 YEAR
Job Description & How to Apply Below

1 day ago Be among the first 25 applicants

As an Accounts Payable Supervisor, you will lead the Supplier team with a primary focus on protecting the organization from significant financial and compliance risks through rigorous controls in supplier onboarding, banking validation, and tax reporting. You will also maintain the integrity of the vendor master file, eliminate fraud risk and unauthorized activity, and ensure secure, accurate accounts payable operations enterprise-wide.

Responsibilities
  • Oversee end-to-end supplier onboarding, including collection and verification of required documentation and ensure accurate creation and maintenance of supplier profiles in People Soft, including 1099 tax classification.
  • Supervise secure collection and verification of banking information using multi-layered authentication to prevent fraud and ensure secure payments. Design and enforce internal controls to prevent fraudulent vendor creation and unauthorized changes.
  • Conduct periodic audits and reconciliations, elevate discrepancies, and drive resolutions. Monitor and report suspicious banking activity and collaborate with Central Procurement and Treasury to ensure compliance with company policies.
  • Supervise, train, and develop AP staff; meet with direct reports to identify and resolve problems and guide the team in resolving issues that prevent or delay invoice payments.
  • Support the AP team by assisting Accounts Payable Manager with reviewing and approving payment runs, resolving match exceptions, document tolerances, and budget review, as well as resolving unposted vouchers, reviewing the aging report, and coordinating payment cancellations due to returned ACH and escheatment.
  • Perform quarterly audit to review tax classification for suppliers and perform TIN matching to validate tax e for the end-to-end process of year‑end 1099 information review, tax statements generation, and IRS filing.
  • Serve as the primary escalation point and operational liaison for Accounts Payable Manager, ensuring continuity and responsiveness in high-volume, deadline-driven environments. Provide functional support to internal Module Lead to resolve system issues, test during upgrades, and assist with necessary training.
  • Work in partnership with Accounts Payable Leadership and Business Technology team on issue resolution, enhancements, and system upgrades related to AP processing, workflow management, Travel & Expense, and supplier management system.
Qualifications
  • Three (3) years of experience in accounts payable operations and systems including supplier management, accounts payable, 1099 tax reporting, and/or general accounting, plus one (1) year of supervisory, mentoring, or project leadership experience within a financial or accounting setting.
  • Preferred: bachelor’s degree in finance, accounting, economics or business administration; certifications related to accounts payable, supplier management, or 1099 reporting; advanced knowledge of accounts payable and/or supplier lifecycle management and ERP systems such as People Soft, SAP, and Oracle; expertise in public sector accounting, internal controls, disbursement policies, and 1099/use tax reporting.
  • Effective communicator: strong verbal and written communication skills with the ability to clearly convey financial and procedural information to both technical and non‑technical audiences. Ability to build and maintain collaborative relationships with internal departments and external vendors.
  • Proficient in fraud prevention, system audits, and process documentation. Experience supervising staff, including training, performance management, and coaching.
  • Analytical leader with excellent analytical and problem‑solving skills, focus on accuracy, process improvement, and risk mitigation. Ability to build, support, and lead a high‑performing team in a dynamic, compliance-driven environment.
  • Highly organized: strong organizational and time‑management skills; can prioritize multiple tasks and meet deadlines in a high‑volume environment.
  • Technically skilled: proficient in Microsoft Office Suite, especially Excel and Outlook, with the ability to generate, analyze, and present data to support…
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