The senior accounts payable specialist is responsible for analyzing and processing complex ap transactions, maintaining reconciliation spreadsheets, and engaging with vendors, procurement, accounting, and other relevant stakeholders across various o&m businesses.this role involves creating, maintaining, and overseeing necessary a/p reports for daily, weekly, quarterly, and yearly use, as well as for audit purposes.additionally, the specialist needs to ensure that accounts are set up correctly and files are accurate.acting as the primary contact for accounting and finance, they coordinate to ensure that payments are successfully processed.the specialist also manages and updates vendor records for the applicable businesses.furthermore, they oversee the various shared a/p mailboxes, serving as the first point of contact for any a/p inquiries and addressing any complex issues that arise from those inquiries.monitor, analyze, and resolve complex invoice discrepancies, collaborating across suppliers, distribution centers, warehouses, customer service, it, procurement, and sourcing, and ensuring issues are followed through to completion.take ownership of vendor disputes and urgent issues (e.g., credit holds), driving resolution through proactive communication and escalation when required.process invoices with discounts to generate savings and improve financial results.proactively review, investigate, and resolve complex invoice and statement issues, ensuring root-cause resolution and full closure.prepare and coordinate payment proposals using erp systems and bank portals, ensuring accuracy and timely execution of supplier payments.reconcile and resolve complex payment-related issues (e.g., check cancellations, refunds, stop payments, advance payments, vcard transactions, employee expenses), ensuring timely completion and minimal business disruption.download and maintain weekly payment vouchers from bank portals for audit and record-keeping.conduct fiscal reporting and tax withholding reviews for payments in mexico and honduras, while also reviewing monthly accruals and non-po processes.generate and analyze reports (e.g., park report, mr11, service entry sheet status, open items, accruals, openvcards, kpis, etc.) to monitor ap operations and provide visibility to leadership.reconcile open items in vendor accounts and purchase orders to maintain accurate financial records and support decision-making.provide analysis of complex statement reconciliations and aged items, driving resolution and ensuring issues are closed with accuracy and completeness.lead and participate in projects to improve ap processes, enhance efficiency, and strengthen internal controls.establish and enforce invoice processing policies and procedures, promoting standardization across teams.provide training and cross-training to team members and business partners to ensure best practices are consistently applied.support the adoption of newly implemented tools and technologies, identifying and addressing potential issues to ensure operational continuity.follow up on open it tickets, test transactions, and troubleshoot daily operational challenges to maintain smooth system functionality.manage vendor master data, including setup of new vendors and updates to existing records, based on validated documentation from procurement or business users.verify and register new suppliers in the bank portal, ensuring accurate onboarding and vendor management.ensure compliance with regulatory requirements (iso*, gdp) and internal policies across all ap activities.