Billing Implementation Specialist (AP/AR)

Waste Solution Services • Lawrence, NY

5d • Onsite

About The Position

Waste 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. The Billing Implementation Specialist owns the end-to-end onboarding of new customer accounts from contract validation through the first 1–2 billing cycles. This role bridges Accounts Payable and Accounts Receivable, ensuring accuracy across contracts, vendor invoices, and client billing before handing off to ongoing operations. This is a high-accountability role responsible for validating data integrity, interpreting complex vendor invoices, and directly generating the first client invoice(s).

Requirements

• 2+ years of experience in Revenue Cycle Operations (A/P, A/R, or Accounting)
• Strong attention to detail with the ability to audit invoices and account setups
• Experience working with vendor portals, invoices, and discrepancy resolution
• Proficiency in Excel or Google Sheets
• Self-starter who takes ownership and doesn’t rely on others to catch errors
• Strong problem-solving skills and the ability to investigate and escalate issues
• Clear communication skills and ability to coordinate across teams
• Comfortable working in a fast-paced, in-office environment

Nice To Haves

• CRM experience is a plus

Responsibilities

• Contract & Data Validation: Review contracts to confirm rates, service details, and effective dates. Ensure all data is accurately entered into internal systems. Identify and resolve discrepancies between proposals, contracts, and system records.
• Vendor Setup & Invoice Management (AP): Set up and link accounts within vendor portals, document and maintain accurate portal login/password information at all times, monitor abnormal payment activity within portals, and react as necessary. Retrieve and analyze vendor invoices, including proration, credits, and adjustments. Ensure vendor billing aligns with contract terms and dispute discrepancies when needed.
• Client Billing Creation (AR): Prepare and distribute accurate first-client invoices based on an understanding of the vendor bill and internal processes, including allocation to the correct GL codes. Handle non-standard scenarios such as partial months, multi-period invoices, and credits. Ensure billing accuracy while protecting company margins.
• Account Transition Management: Oversee transitions from old vendors to new vendors, including final balances and credits. Determine proper billing treatment (pass-through vs. managed billing). Prevent duplicate or missed billing during onboarding. Make updates, including linking or unlinking customers in the vendor portals.
• Client Communication & Ownership: Partner with Sales and communicate directly with clients during onboarding. Walk clients through their first invoice and billing structure. Own accounts through the first 1–2 billing cycles, ensuring accuracy and consistency. Transition fully onboarded accounts to ongoing AP/AR teams.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed