Billing Analyst

Interstate Waste Services is the most progressive and innovative provider of solid waste and recycling services in the greater New York, New Jersey and Connecticut markets with a rail-served landfill in Ohio.  IWS is committed to delivering high-quality waste, recycling and environmental services, while prioritizing the safety of our employees, customers and communities. We cater to a diverse range of industrial, medical and commercial/residential customers.

Founded in 1998, IWS has grown over the years through acquisitions, many of which were family-owned businesses that remain a part of our team today. We’re proud to combine the resources of a large company with the values and care of a family-run business.

• Conduct routine and ad hoc billing audits within Tower to ensure billing accuracy and alignment with service records, contracts, and operational data. Resolve discrepancies through structured root cause analysis.
• Perform detailed reconciliations between Tower, operational systems, and ERP data. Identify root causes of billing discrepancies and implement corrective actions.
• Ensure timely and accurate invoice delivery through Billtrust. Validate that invoices reflect correct charges and customer account configurations.
• Generate recurring and ad hoc billing reports. Deliver clear, actionable insights to Finance, Operations, and leadership teams.
• Lead initiatives to streamline billing, reduce errors, and improve data flow between systems. Create and maintain process maps and standardized documentation to support consistent execution.
• Use structured methodologies (e.g., 5 Whys, Fishbone, Pareto) to investigate billing issues and drive sustainable improvements across systems and teams.
• Partner with field operations and customer service to ensure accurate reflection of services in billing, especially during route changes, container swaps, or frequency adjustments.
• Support the financial and operational integration of acquired companies by validating billing data in Tower, aligning practices with company standards, and reconciling legacy systems. Monitor post-acquisition billing accuracy and present findings.
• Work closely with IT and system administrators to enhance usage of Tower and Billtrust. Recommend improvements and assist in user testing and deployment of system updates.
• Create and deliver clear, concise presentations to communicate process changes, audit outcomes, integration updates, and improvement initiatives to various stakeholders.
• Maintain detailed documentation of billing processes, system workflows, and audit trails. Ensure compliance with internal policies and audit standards.
• Partner with operations, accounting, finance, and IT teams to ensure accurate and efficient revenue reporting.
• Provide training and guidance to internal teams on billing and related best practices.

• Bachelor’s degree in finance, Accounting, Business Administration, or related field.
• 2–4 years of experience in billing, financial operations, or accounting with a focus on process improvement and system use.
• Experience working in Tower (billing system) and Billtrust (invoice presentment platform) strongly preferred.
• Proficiency in Microsoft Excel (pivot tables, lookups, advanced formulas).
• Experience with process mapping tools (e.g., Visio, Lucidchart, Miro) and documenting current/future-state workflows.
• Strong presentation and communication skills; ability to convey technical information clearly to diverse audiences.
• Demonstrated success with structured root cause problem-solving and continuous improvement initiatives.
• Comfortable collaborating cross-functionally in a fast-paced environment.
• Experience in the waste management, utilities, logistics, or field services industry preferred.
• Involvement in post-acquisition integration and billing system transitions preferred.
• Exposure to Lean, Six Sigma, or other process improvement methodologies preferred.
• Familiarity with route-based billing logic and service-to-invoice workflows preferred.