AP Vendor Onboarding Specialist

Job Title: AP Vendor Onboarding SpecialistLocation: New York (Full-Time, In-Office / Remote)Pay range: $29-$34/ hrWho We AreWaste Solution Services (WSS) helps multifamily and commercial portfolios lower and stabilize waste spend. We do not haul trash; we sit between clients and haulers to audit invoices, optimize contracts, right-size service, centralize billing, and manage service issues. Our work is built around cost predictability, operational clarity, and strong execution.OverviewJoin our Accounts Payable team as an AP Vendor Onboarding Specialist. You will own the critical early-stage setup and validation of new vendor accounts, ensuring billing accuracy from day one. If you have a keen eye for detail and expertise in vendor portals, reconciliation, and resolving billing discrepancies, this essential role is for you. Full-time position in New York (Remote/Hybrid options available).Key ResponsibilitiesNew Account Setup & AP OversightOwn the Accounts Payable setup process for all new customer accounts during the initial service periodEnsure proper WSS access is established in all vendor portals for internal visibility and controlMaintain clean and accurate account structures within internal systemsBilling Validation & Early-Stage ReconciliationReview and validate first-month (and early-stage) vendor invoices to ensure accuracy before passing information to AR for customer billingReconcile whether initial invoices were paid by the customer or internally, and clearly document billing responsibility and timingIdentify vendor billing discrepancies early and take ownership of escalating and disputing themTrack escalated issues to ensure timely resolution and proper follow-throughEnsure billing aligns with contracted rates, service levels, and agreed termsCross-Functional CollaborationPartner with Accounts Receivable (AR) by relaying accurate, validated billing information for customer invoicingEnsure a clean handoff from AP (setup and validation) to AR (ongoing billing) after the initial account periodTracking & DocumentationMaintain detailed records of account setup, billing validations, discrepancies, and dispute outcomesTrack exception cases and ensure all issues are resolved and documented before transitioning accounts out of the initial phaseEnsure CRM and internal systems reflect accurate base rates, fees, and billing timelinesQualifications2+ years of experience in Accounts Payable, billing operations, or vendor coordinationStrong attention to detail with the ability to audit invoices and account setupsExperience working with vendor portals, invoices, and discrepancy resolutionProficiency in Excel or Google Sheets; CRM experience is a plusStrong problem-solving skills and the ability to investigate and escalate issuesClear communication skills and ability to coordinate across teamsComfortable working in a fast-paced, in-office environmentNotice: WSS does not accept unsolicited contact from recruiters, agencies, or third-party vendors. Applicants must complete the official application to be considered. Direct emails or phone calls to the Company will not be accepted and may result in disqualification from consideration.Powered by JazzHR