Accounts Payable Supervisor

About Us: Guardian Security was founded in 1976 and has been serving Washington State residents with life and property protection ever since. We are proud to be celebrating 50 years in business! We are locally owned and operated, with five offices located in Yakima, Tacoma, Bellingham, Wenatchee, and in the SODO district of Seattle. To learn more about us, visit https://www.guardiansecurity.com/ ; Kindness – Growth Mindset – Technical Excellence – Safety – Predictable Success – Customer Heroes Position Summary: The Accounts Payable Supervisor leads and oversees the day\-to\-day operations of the Accounts Payable function, supervising AP clerk while remaining hands\-on with processing, vendor compliance, and month\-end activities. This role ensures invoices are processed accurately and timely, vendor records and tax documentation are properly maintained, and AP activity is reconciled and reported correctly to support a clean, on\-time close. The role requires close collaboration with the Accounts Receivable and GL Accounting teams, as well as cross\-functional coordination with payroll, purchasing, and compliance departments. Pay: $31\-$36 per hour Work Location: Hybrid (3 days remote, 2 days in office at our SODO Seattle location) Core Duties: Lead, mentor, and develop the AP team while establishing clear expectations, priorities, and accountability. Continuously evaluate AP workflows and implement improvements that increase efficiency, accuracy, visibility, and scalability. Perform two\- and three\-way matching, resolving price, quantity, tax, and receipt discrepancies before posting Reconcile agency credit card transactions and accounts payable activity by reviewing vendor statements, identifying discrepancies and ensuring timely resolution of differences. Execute timely ACH, wire, and card payments in accordance with regulatory requirements and approval, segregation\-of\-duties, bank\-change verification, and fraud\-prevention controls Resolve escalated vendor inquiries, payment discrepancies, and disputed invoices. Own vendor master file governance: new vendor setup, W\-9 collection and validation, and ongoing maintenance of accurate vendor records. Ensure proper 1099 classification throughout the year and manage year\-end 1099 preparation and filing. Partner with GL/accounting staff to ensure invoices are coded to the correct GL accounts and cost centers, escalating ambiguous coding questions rather than guessing. Reconcile bank statements as necessary; Reconcile the AP subledger to the GL control account monthly; research and resolve reconciling items. Prepare and review AP aging and accrual schedules to support accurate month\-end close. This list is not exhaustive. Other duties, responsibilities, and activities may change or be assigned as needed. Key Competencies: Strong attention to detail and accuracy. Excellent verbal and written communication skills. Ability to problem\-solve and work with little direction. Excellent time management, planning and forward\-thinking skills. Has a positive and professional attitude. Must be organized and detail oriented. Preferred Qualifications: Associate's or Bachelor's degree in Accounting, Finance, or related field preferred; equivalent experience considered. Minimum 4\+ years of Accounts Payable experience, including at least 1–2 years in a lead or supervisory capacity. Experience working with corporate credit card platforms and employee expense reimbursement and a strong interest in improving and optimizing system processes. Strong understanding of the full AP cycle, including invoice workflows, vendor management, 1099 compliance and basic GL/reconciliation concepts. Solid understanding of US GAAP and accrual accounting. Strong Excel skills and comfort working with vendor and payment data. Experience in the security, construction, or service\-based industry is a plus. Experience working with subcontractors is beneficial Benefits: Low\-cost Medical, Dental, and Vision insurance Paid Time Off (PTO) that builds with tenure \+ Paid Sick Time (PSST) 401(k) with company match after 1 year Life Insurance premiums paid for by Guardian AD\&D insurance Employee Assistance Program (EAP) Flexible Spending Account (FSA) Tuition reimbursement and paid professional development opportunities Work Environment: This job is primarily sedentary and requires regular use of a computer, keyboard, and monitors. Close vision and distance vision are necessary. Employees may regularly lift and/or move up to 10 pounds and occasionally lift and/or move up to 25 pounds. Equal Employment Opportunity: We are committed to creating a diverse and inclusive workplace and encourage all qualified candidates to apply. All employment decisions are made without regard to race, color, religion, gender, sexual orientation, national origin, disability, or any other characteristic protected by applicable law.