Accounts Payable Supervisor

King County•Seattle, WA

1d•Hybrid

About The Position

Wastewater Treatment Division's Finance section is hiring for an Accounts Payable Supervisor. Join one of the nation’s largest wastewater treatment agencies and lead the creation of a centralized accounts payable function in the Wastewater Treatment Division. This is a unique opportunity to shape a new team, establish efficient workflows, and ensure compliance while safeguarding ratepayer funds. You’ll work closely with WTD procurement staff and King County’s central procurement and payables teams to ensure accurate, timely payments that comply with our contracts, while safeguarding water quality, the environment, community resources, and supporting our equity and social justice objectives. This role will lead a new team within the Wastewater Treatment Division (WTD) Finance section. The successful candidate will centralize the accounts payable function in Finance, identify gaps in WTD’s current processes, and implement new strategies to reduce risk and ensure alignment with King County accounts payable and industry standards. They will also provide guidance and support to internal WTD customers on accounts payable needs and work closely with WTD’s procurement staff to ensure contract terms and conditions related to invoicing are followed. They will also work with other King County agencies, such as Procurement & Payables. This role will assist in hiring and subsequently supervising a new team of accounts payable support staff. This position follows a hybrid work model, blending remote and in-person work.

Requirements

Supervisory & Leadership Experience: Experience supporting and guiding a team, including participating in hiring and onboarding, providing coaching and feedback, assisting with performance management, helping with work planning, and fostering staff development and mentorship.
Demonstrated ability to lead teams in a high-volume, deadline-driven environment while maintaining service quality, strong internal controls, and employee engagement.
Accounts Payable Expertise: Experience in accounts payable operations within a large organization, including invoice review and processing, vendor setup and maintenance, payment authorization, P-Card administration, employee reimbursements, reconciliations, reporting, and compliance.
Demonstrated experience coordinating and leading fiscal year-end AP close activities, including accruals, reconciliations, and collaboration with accounting and central payables units.
Internal Controls, Audit & Compliance Experience: Proven experience establishing and maintaining effective internal controls and ensuring compliance with federal, state, and local regulations, accounting standards, and audit requirements.
Experience supporting internal and external financial audits, including preparing documentation, responding to findings, and implementing corrective actions.
Process Improvement & Operational Excellence: Demonstrated success leading process improvement initiatives and applying Lean or continuous improvement methods to strengthen internal controls, streamline workflows, improve timeliness, and enhance customer service.
Experience developing and maintaining policies, procedures, and standard operating procedures that promote consistency, accountability, and audit readiness.
Collaboration and Stakeholder Engagement: Experience working collaboratively with internal partners to ensure accurate, timely, and compliant financial processing.
Ability to represent the Accounts Payable function as a subject matter expert to leadership, central finance partners, and auditors.
Financial Systems and Reporting: Proficiency with enterprise financial systems with specific expertise in the Accounts Payable and General Ledger modules.
Experience using reporting and analytical tools to monitor workload, performance metrics, AP aging, and service levels.

Nice To Haves

Customer Focus - Building strong customer relationships and delivering customer-centric solutions.
Communicates Effectively - Developing and delivering multi-mode communications that convey a clear understanding of the unique needs of different audiences.
Collaborates - Works cooperatively with others across the organization to achieve shared objectives. Represents own interests while being fair to others and their areas. Partners with others to get work done. Credits others for their contributions and accomplishments. Gains trust and support of others.
Decision Quality - Making good and timely decisions that keep the organization moving forward.
Manages Conflict - Handling conflict situations effectively, with a minimum of noise.
Action Oriented - Taking on new opportunities and tough challenges with a sense of urgency, high energy, and enthusiasm.
Ensures Accountability - Holding self and others accountable to meet commitments.
Builds Effective Teams - Building strong-identity teams that apply their diverse skills and perspectives to achieve common goals.
Drives Engagement - Creating a climate where people are motivated to do their best to help the organization achieve its objectives.
Courage - Stepping up to address difficult issues, saying what needs to be said.
Instills Trust - Gaining the confidence and trust of others through honesty, integrity, and authenticity.
Being Resilient - Rebounding from setbacks and adversity when facing difficult situations.

Responsibilities

Supervise and lead the Accounts Payable (AP) team, including hiring, training, work assignment, performance management, and staff development.
Oversee all AP operations, including invoice processing, purchase order matching, vendor setup and maintenance, payment approvals, P-Card administration, and employee reimbursements.
Ensure accurate, timely, and compliant processing of payments in accordance with policies, regulations, and internal controls.
Evaluate and improve AP processes through gap analysis; implement enhancements in collaboration with procurement and finance partners.
Develop and maintain AP policies, procedures, and standard operating practices to strengthen internal controls, mitigate risk, and support audit readiness.
Coordinate fiscal year-end close activities, including accruals, reconciliations, and cutoff procedures.
Support internal and external audits by preparing documentation, responding to inquiries, and implementing corrective actions.
Serve as the primary AP liaison to internal stakeholders, Central Payables, and vendors; resolve issues and ensure continuity of operations.