Supervisor, Accounts Payable

Port of Seattle•Seattle, WA

About The Position

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. You will oversee end-to-end supplier onboarding, including collection and verification of required documentation and ensure accurate creation and maintenance of supplier profiles in PeopleSoft, including 1099 tax classification. You will supervise secure collection and verification of banking information using multi-layered authentication to prevent fraud and ensure secure payments. You will also design and enforce internal controls to prevent fraudulent vendor creation and unauthorized changes. You will conduct periodic audits and reconciliations, escalate discrepancies, and drive resolution. You will also monitor and report suspicious banking activity and collaborate with Central Procurement and Treasury to ensure compliance with company policies. You will supervise, train, and develop Accounts Payable (AP) staff and meet with direct reports to identify and resolve problems and guide and assist AP team in resolving issues that prevent or delay invoice payments. You will provide support to the AP team by assisting Accounts Payable Manager with reviewing and approving payment run, resolving match exceptions, document tolerance, and budget review, as well as resolving unposted vouchers, reviewing the aging report, and coordinating payment cancellations due to returned ACH and escheatment. You will perform quarterly audit to review tax classification for suppliers and perform TIN matching to validate tax ID. You will be responsible for the end-to-end process of year-end 1099 information review, tax statements generation, and IRS filing. You will serve as the primary escalation point and operational liaison for Accounts Payable Manager, ensuring continuity and responsiveness in high-volume, deadline-driven environments. You will also provide functional support to internal Module Lead to resolve system issues, test during upgrades, and assist with necessary training in the field. You will 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.

Requirements

Experienced – You have three (3) years of Experience in accounts payable operations and systems including supplier management, accounts payable, 1099 tax reporting, and/or general accounting, to include one (1) year of supervisory, mentoring, or project leadership experience within a financial or accounting setting.
Committed to Equity – You will apply equity and exemplify shared values, behaviors, and practices in all aspects of the work. At the Port of Seattle, equity is a daily responsibility and a foundational expectation for all Port employees.
Proficient –. You have strong experience in fraud prevention, system audits, and process documentation. You also have experience supervising staff, including training, performance management, and coaching.
Efficient Communicator – You possess strong verbal and written communication skills with the ability to clearly convey financial and procedural information to both technical and non-technical audiences. You can also build and maintain collaborative relationships with internal departments and external vendors.
Analytical Leader – You have excellent analytical and problem-solving skills with a focus on accuracy, process improvement, and risk mitigation. You can build, support, and lead a high-performing team in a dynamic, compliance-driven environment.
Highly Organized – You possess strong organizational and time management skills and can prioritize multiple tasks and meet deadlines in a high-volume environment.
Technically Skilled – You are proficient in Microsoft Office Suite, especially Excel and Outlook, with the ability to generate, analyze, and present data to support decision-making.

Nice To Haves

Desired – We hope you have a 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 PeopleSoft, SAP, and Oracle and expertise in public sector accounting, internal controls, disbursement policies, and 1099/use tax reporting

Responsibilities

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.
Maintain the integrity of the vendor master file, eliminate fraud risk and unauthorized activity, and ensure secure, accurate accounts payable operations enterprise-wide.
Oversee end-to-end supplier onboarding, including collection and verification of required documentation and ensure accurate creation and maintenance of supplier profiles in PeopleSoft, 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, escalate discrepancies, and drive resolution.
Monitor and report suspicious banking activity and collaborate with Central Procurement and Treasury to ensure compliance with company policies.
Supervise, train, and develop Accounts Payable (AP) staff and meet with direct reports to identify and resolve problems and guide and assist AP team in resolving issues that prevent or delay invoice payments.
Provide support to the AP team by assisting Accounts Payable Manager with reviewing and approving payment run, resolving match exceptions, document tolerance, 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 ID.
Responsible 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 in the field.
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.